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Discover the hidden logic behind everyday items in this eye-opening exploration. From the tiny hole in airplane windows to the secret features of kitchen tools, these designs are intentional and functional. Join us as we reveal how seemingly mundane objects have extraordinary purposes rooted in science and efficiency. Unravel the mysteries that surround your belongings and see them in a whole new light. This journey into the world of design will transform your perspective on the ordinary.
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FunTranscript
00:00:00There's a tricky anti-rodent disc to make sure no rat is aboard.
00:00:04Rats usually get on a boat via mooring chains, so this disc fits onto them.
00:00:09And no rodent can go on a voyage.
00:00:12Jewelry is often sold in small pouches.
00:00:14They actually have a hidden purpose.
00:00:17They help prevent tarnish.
00:00:18Most retailers assure that the ring or whatsoever was sold is safe and secure.
00:00:23In most supermarkets, oranges usually come in mesh bags.
00:00:28Well, those bags don't really have any hidden purpose, but you can turn it into a great
00:00:32scrubbing tool.
00:00:33Just tie it up and see how it works next time you have an extra greasy frying pan.
00:00:38You don't need to scoop the jam out of a double yogurt container section.
00:00:42This type of plastic is quite flexible, so you just need to fold it in half and pour
00:00:47the jam directly into the yogurt section.
00:00:50The hidden function of a cup plunger is actually that it was meant to be used for sinks.
00:00:55Yeah, it works for toilets too, but you can keep an extra one to unclog the sink in case
00:01:00you need it.
00:01:01An extra hole at the upper part of the sink has multiple hidden functions.
00:01:06First, in case someone forgets to close the tap, the water won't overflow, and the bathroom
00:01:11won't get flooded.
00:01:12Second, thanks to that hole, the water drains faster as it gives an escape for the air helping
00:01:18the water flow down.
00:01:20Most metallic zippers have a hidden lock inside them to save them from awkward situations,
00:01:25such as an undone fly.
00:01:27Don't leave the zipper handle in an upward position.
00:01:29When you pull it downwards, it automatically locks.
00:01:32It's all thanks to those tiny grooves hidden underneath the handle.
00:01:36Bath foam isn't only for fun or a nice smell.
00:01:40It also helps regulate the temperature.
00:01:42The bubbles keep the water hot, so you can enjoy a bath a bit longer.
00:01:45Anyway, it works for acrylic bathtubs only.
00:01:48Those made of metal lose heat really fast either way.
00:01:52Escalator brushes aren't for keeping your shoes clean and polished.
00:01:56It might be tough to apply wax right on that brush while the escalator's moving.
00:02:00It's for our safety.
00:02:02Brushes won't let you come close to the edge, so a long coat or boot-cut jeans won't
00:02:07end up in between the steps.
00:02:09Originally, golf balls were smooth.
00:02:11They have a dimpled surface now because players noticed that overused balls with damages flew
00:02:17better than brand new ones.
00:02:18At some point, manufacturers started producing balls with dimples.
00:02:24If you take a box of aluminum foil, you'll see tabs you can press on the side.
00:02:29They keep the foil straight and prevent it from rolling.
00:02:31It's also easier to tear off some amount of foil thanks to those tabs.
00:02:36Jerry cans have three handles for a reason.
00:02:39It's a smart designer move, so when you carry it alone, you use only the central handle to
00:02:44distribute the weight evenly.
00:02:45But your friend wants to help you out.
00:02:47Each of you grabs the side handle.
00:02:49Two flat prongs you can see on standard plugs used in North and Central America make sense.
00:02:55But how about those holes near the tips?
00:02:57Thanks to them, the outlet firmly grips the plug so that it won't loosen or fall out
00:03:02of the socket.
00:03:03It's sometimes irritating when you haven't used the entire stick of deodorant.
00:03:07There's a little bit more left, but it's hard to reach it.
00:03:11Okay, the trick is easy.
00:03:12Unscrew the bottom, take a pencil, and force it underneath that moving platform.
00:03:17That way, you'll push what's left of the deodorant out.
00:03:21There's a number put on the side of many cosmetic products.
00:03:24It isn't picked randomly.
00:03:25It tells you how long your product will last after you've opened it.
00:03:29This is why it has an open jar for a graphic symbol.
00:03:32A linch roller is good at removing those tiny fibers, but you can also use it to clean other
00:03:37stuff.
00:03:38For example, when you want to remove the dirt from the utensil tray in your dishwasher,
00:03:42simply take your sticky linch roller and put it into each compartment, and all the crumbs,
00:03:47dirt, and leftovers are all gone.
00:03:50Kings depicted on playing cards are real historical characters.
00:03:53Spades, King David, clubs, Alexander the Great, hearts, Charles the Great, diamonds, Julius Caesar.
00:04:03Rings used to be more than a stylish accessory.
00:04:06The nobility used rings as a seal.
00:04:08Archers wore rings to protect their fingers from bowstring injuries, while needlewomen from needle
00:04:14pricks.
00:04:16Detachable headrests in cars are all about safety.
00:04:19If you pull it out of a seat, you'll see two pretty sturdy bars.
00:04:22If you ever get locked or trapped in a car, you can get out of there smashing the window with
00:04:27these bars.
00:04:28A little arrow next to the refueling indicator on the car's dashboard indicates which side of the
00:04:33vehicle has fuel tank openings.
00:04:36It's useful when you need to refuel a rented car.
00:04:39You are probably using shampoo wrong all the time.
00:04:42Well, the main thing you should know is that you don't apply it directly on your hair.
00:04:46You gotta apply it onto the roots only.
00:04:49The foam that you make is enough to clean your hair.
00:04:52A button on the reverse side of a shirt collar is needed to hold a tie in place.
00:04:57Anyway, this button was designed for slim ties that are not that popular today,
00:05:01so this button is only an element of design.
00:05:04A cotton pads pack has those strings on it to hang it on some hook or holder.
00:05:09There's no need to untighten and tighten the pack again.
00:05:12Look at the bottom.
00:05:13It has a perforated line.
00:05:15Tear along it and just pull out a cotton pad from a hanging pack.
00:05:19It's a myth that the red side of the eraser is for pencil and the blue one is for ink.
00:05:24The blue gets rid of mistakes on thicker types of paper only.
00:05:28It works both for pencil and even ink, but make sure the paper is really thick.
00:05:33But that blue little thing can do so much more.
00:05:35It can polish your jewelry, clean your electronics.
00:05:38For example, the screen of your cell phone.
00:05:40You know those irritating sticker residues that won't peel off?
00:05:44Eraser helps there too.
00:05:45Same as with cleaning scuffed up suede or dirt you have on your walls.
00:05:49There's no need to tear one of its edges on stick sachets.
00:05:52The right way is to tear them down the middle.
00:05:55You say it's not a big difference, but at least there's less mess with those torn paper bits.
00:06:00A small V-patch at the bottom of the collar helps put on the sweater without losing any shape over
00:06:05time,
00:06:05because it's made of a double layer of webbing material, just like waistbands and cuffs.
00:06:11To avoid spilling juice right onto your t-shirt, try pouring it from the other side of the carton.
00:06:16This way, it sloshes less and it's easier to control.
00:06:20To enjoy fresh and soft peanut butter, store it upside down.
00:06:24This way, the oils won't stay on the bottom all the time and distribute evenly in the jar.
00:06:30Yeah, you've heard before that a drawer beneath your oven is there for
00:06:33keeping the food warm if the guests are running late.
00:06:36Hey, you can also slow cook on lower temperatures in that drawer.
00:06:40Automatic lip liners and eye pencils sometimes have a sharpener installed in the package.
00:06:46The lid on the back part of the pencil doesn't only reveal the color.
00:06:49You can pull it out and sharpen up the product.
00:06:53Grocery cart loops help organize all the stuff in your cart better,
00:06:56so you can enjoy your supermarket trip.
00:06:59You don't want to put your brand new fancy white jacket in a cart next to carrots and onions, huh?
00:07:04Fruit stickers know everything about your apple's past.
00:07:07A five-digit number where the first number is nine is a good sign.
00:07:11It's an organic product.
00:07:13A four-digit number starting with a three or four means it was conventionally farmed.
00:07:19If the number starts with an eight and there are five digits, it's best to leave it on the shelf.
00:07:24Metal buttons on jeans, also known as rivets,
00:07:27help make the pockets more durable when miners would fill them with heavy tools.
00:07:31They're still helpful today. Even if you don't store anything heavy in your pockets,
00:07:35rivets strengthen the seams and make your jeans last longer.
00:07:39All Tic Tac containers are designed to dispense one Tic Tac every time you open it.
00:07:44The lid has the same shape as the candy. Turn the container upside down,
00:07:49gently shake it and slowly open it. You'll notice only one candy stuck between those lid grooves.
00:07:54So if you just open the container and shake it until five or even more candies fall into your mouth,
00:08:00it means you've been eating Tic Tacs wrong all this time.
00:08:06So grab your phone. Good. Now turn it around.
00:08:09You see that little dot between the camera and the flash?
00:08:13That's a tiny microphone. Bet that's something you didn't know.
00:08:17What's it doing there? Well, when you're on a phone call,
00:08:20this little guy is busy at work, reducing the amount of background noise other people hear when
00:08:25you talk. That's right. If it wasn't for this, calls wouldn't be as nearly as crisp as they are now.
00:08:32You're lost in the woods and you're rushing to get back to camp.
00:08:37You suddenly remember you've got something that can help.
00:08:40You grab one of your chest straps from your backpack and whistle on it.
00:08:45Yup, that's right. A lot of bags have this feature in them,
00:08:49especially the ones made for the outdoors. It isn't long before you hear the call of one of your
00:08:54friends and you follow them back to the warm campfire, saved by this cool bit of design.
00:09:01If you're a curious person, you might have wondered what that little pocket in your jeans is doing
00:09:06there. You know, the one that's inside the bigger pocket. People often use it to store coins and bills,
00:09:13but it's not meant for that. It's actually designed to store your pocket watch safely.
00:09:18Huh? Maybe that's where the name pocket watch comes from.
00:09:23You finally arrive home after a long day's work. You understandably don't feel like cooking,
00:09:29so you sit on the couch and watch a bit of TV and order some takeout. How about Chinese? Ah,
00:09:36perfect.
00:09:37There's the doorbell. That has to be your food! It smells delicious!
00:09:42Wait! Before you grab the plates, do this instead. Open your Chinese food container on the table.
00:09:48It becomes the perfect plate. And it's cardboard. Which means no cleaning either!
00:09:55The can of soda you got with your food has a cool feature too.
00:09:59Look at the tiny metal tab there, the one you used to open the can. Guess what? You can fit
00:10:05your straw in
00:10:06there. In fact, that's exactly what they're made for. Go ahead, try it for yourself.
00:10:12If you're not at your computer, take a look at your keyboard right now. If you're not, that's okay.
00:10:18Here's one on the screen. The keycaps are arranged in what's called the QWERTY layout,
00:10:23named after the first six keycaps below the numbers. As it turns out, it wasn't always this way. They used
00:10:30to
00:10:30be laid out alphabetically, which would make more sense when you think about it. The alphabetical
00:10:35layout fell out of use because long ago, there were things called typewriters. Remember those?
00:10:42You press down a key, and a type bar would fly out, hitting an inked ribbon and stamping a letter
00:10:48on the piece of paper. Eventually, typists got good at this and typed faster. Too fast.
00:10:54The type bars would eventually get caught in a log jam with each other, ruining the flow. To fix this
00:11:00problem, they made keyboards with randomized keycaps. The new layout actually worked better because it
00:11:07made typing harder, helping to slow typists down and prevent the type bars from getting stuck. Much
00:11:12better! Today, no type bars. No typewriters, mostly. People are still fast nowadays, but you just can't
00:11:20help but wonder who was faster though, us or them. Keyboards have another hidden feature too. Have you
00:11:27ever noticed that the F keycap and the J keycap have little bumps on the bottom of them? As it
00:11:32turns out,
00:11:33they're there to help people figure out where they are on the keyboard without having to take their eyes
00:11:38off the screen. Grabbing a takeaway cup of coffee at your favorite cafe might be just what you need to
00:11:45fully wake up in the mornings. When you get back home or to work though, you might be afraid to
00:11:51stain
00:11:51your desk when you put the steaming hot coffee down. Worry not, your plastic lid isn't only good for
00:11:57keeping your coffee hot, it also doubles as a coaster. In fact, they're the perfect size to hold a cup.
00:12:04Try it for yourself. This one's going to come in handy if you're a home cook. If you're like me,
00:12:10you might have a bit of trouble deciding how much pasta you need for just one serving.
00:12:16Well, if you've got a pasta scoop, grab that. Most people don't know what the little hole in the
00:12:22middle is for and assume it's supposed to help with water drainage or something. It turns out that
00:12:27it helps you measure out a perfect serving. Just see how much dry spaghetti you can fit in the hole
00:12:33and use that as one portion. Out of the store buying coat hangers,
00:12:39you might notice that the plastic ones feel cheaper than the wooden ones.
00:12:43There's a good reason for this. Wooden hangers are made out of cedar wood.
00:12:47The big difference between the two is that the wooden ones repel bugs and moths.
00:12:54They're stronger and last longer too. Perfect for things that might stay in your closet for a long time.
00:13:01When you brush your teeth, you might have noticed that your toothbrush has blue bristles.
00:13:05They're not just there for show. In fact, they're there to tell you when it might be time to switch
00:13:11toothbrushes. These bristles lose their strength and color when the brush has been worn down,
00:13:17letting you know that it's time to get rid of it.
00:13:21Microwaves often look a bit like mini TVs, especially ones where you can clearly see the
00:13:26black film around them. This is actually a really important feature that's used to keep the radiation
00:13:32from slipping away. They're called Faraday cages, if you want to get technical.
00:13:37This is why you can stand next to a microwave without melting into a puddle.
00:13:42That's not to say you should stand in front of the microwave and watch your food heat up,
00:13:47but at least you know you won't grow an extra ear or something. Okay, not really.
00:13:52Some ovens have a drawer under them. It's tempting to use this to store random
00:13:57junk you don't use often, but there's a better use for it. Instead, this should be used to help
00:14:02keep the food that's waiting to be served hot. You can take it out of the oven and store it
00:14:07right
00:14:07in this drawer, keeping your oven free for you to carry on cooking.
00:14:13Now, you're on a plane looking around trying to pass the time before takeoff.
00:14:17When you examine the window, you notice this has a little, very tiny hole on its bottom.
00:14:23Don't worry, it's not broken. It's there to relieve the pressure that builds up over time as the plane
00:14:29goes up and down. It also lets the air flow through it. Now, raise your hand if you've ever ridden
00:14:35on
00:14:35an escalator and scrubbed your shoes on its bristles. Hey, I'm guilty of doing that. Maybe more than I
00:14:41should. It's not there to clean your shoes, though. It's an important safety measure. It stops your
00:14:47shoelaces, clothing, and other stuff from getting stuck in there, avoiding a nasty scene when you go
00:14:53to get off. Sometimes a piece of fabric comes with your new clothing. It usually comes along with the
00:14:59extra buttons in a little plastic bag. You might think it's just a piece of fabric to use for future
00:15:05patching, in case you rip it. But that isn't its purpose at all. It's actually supposed to be put
00:15:11in the washing machine to test how it reacts to various washings. Now, you don't have to worry about
00:15:17shrinking your new, expensive coat because you know how it'll react to the wash.
00:15:22Bubbles! Who doesn't love bubbles? Most people have fond memories with bubble blowers as a kid.
00:15:28But as adults, the closest thing we can get to recapturing that feeling is with bubble baths.
00:15:34After a hard day at work, there's nothing better than dipping into a nice warm bubble bath.
00:15:39Right, guys? And the bubbles do more than just clean you. If they're high-quality bubbles,
00:15:44they'll serve as a heat insulator. So they make sure that your bath stays warm for longer.
00:15:52Boxes of chocolate sometimes have these mysterious holes in them. When I'm eating a box, or two,
00:15:58I usually ignore them and take out the chocolate by pressing the bottom of the plastic. But it turns
00:16:04out that I've been doing it wrong the whole time. If you press one of the holes, the chocolate comes
00:16:10right out. I'm certainly going to start doing this from now on.
00:16:15Here's another one from the kitchen. The handle on a pot will often have a hole in it. Most people
00:16:21use this to hang them on a nail on the wall as an easy storage method. The hole has another
00:16:27use too.
00:16:28When you're cooking, you can use this handle to hold your wooden spoon or whatever else you might
00:16:33be cooking with. This makes sure you don't make a mess when you put it down.
00:16:39Glass bottles usually come with a cap in them. Well, duh! Otherwise, the liquid would just spill.
00:16:45In this cap, there's a plastic liner that seemingly has no purpose, right? Wrong. It's a seal!
00:16:53No, not a seal. A seal! It's the kind that helps keep your drink fizzy. Ah, just the refreshment I
00:17:01needed.
00:17:02A lot of doorknobs are made out of brass, and it's not by chance. They're made out of this specific
00:17:08material because it's bacteria's worst enemy. That's right, it destroys them. Perfect for those
00:17:14who want to keep a clean house and avoid germs. Hey, you want to fish?
00:17:22You know, there are all sorts of amazing things you can do with products already lying around the house
00:17:28that were meant for other things. We'll explore some of those, plus everyday items that have
00:17:34other purposes you may not be aware of. I'm also in a silly mood, so hey, let's have some fun!
00:17:41Many pairs of kitchen scissors today have a serrated opening where the handles and blades meet. You can
00:17:48use this as an herb stripper to de-stem difficult herbs like thyme, rosemary, and chives. Saves you a
00:17:55lot of time trying to pick the leaves off by hand. And if you're short of a vase, you could
00:18:00present
00:18:01roses to your significant other this way. Just be careful when you're pointing the sharp end.
00:18:07The metal tab on soda cans can be flipped around. You can slip a straw in place so you don't
00:18:13have to
00:18:13hold it up to your mouth. This stay-on tab replaced the pull ring tab created in the early 60s.
00:18:19You
00:18:20remember those, don't you? Those could be quite sharp and easily discarded where they could be a
00:18:25menace for others. Now you can pop your straw straight into one. Also means you can produce some
00:18:32bubbles and make a mess. Sometimes, when you purchase an article of clothing, you receive
00:18:38a plastic baggie with an extra button and a swash of fabric. While the fabric is clearly used to patch
00:18:45holes, it can also be used to test the effects of various cleaners on certain surfaces. It's handy
00:18:51too to test wash cycles before using them to wash the whole garment. And if you want to clean your
00:18:58nose
00:18:58with it, that suggestion never came from me. You can use a screwdriver for leverage if you're
00:19:05having trouble lifting or moving something. Some also have a hexagonal shape handle that fits inside
00:19:11a wrench or spanner. You can use it to improve torque and, again, for leverage. A little easier
00:19:17on your hands. Some of us aren't that strong. Or maybe that's just me. Rubber bands are great for
00:19:24many things. But if you have a bottle that's hard to open, you can wrap the band around it for
00:19:30a
00:19:30better grip. Escalators have those fluffy black brushes for a similar reason that some have yellow
00:19:37lines on their steps. To try and deter people from getting too close to dangerous places. People don't
00:19:43always take notice, and sometimes clothing can drape close to a point where the step meets the edge or
00:19:49skirt. The brush is a little barrier to help prevent this from happening. They can also catch
00:19:55bits of fluff and prevent other small things from falling down into the gaps.
00:20:01Your average pair of jeans has several features that are both functional and somewhat sentimental.
00:20:07The meadow rivets around the pockets help secure the stress points. This ensures they last a bit
00:20:13longer than average, though not all jeans have them. Many still have a tiny pocket, directly above the
00:20:21main pocket. This was originally meant to hold a pocket watch. Even though pocket watches are mostly
00:20:27a thing of the past, many people still use this space to store coins, rings, or even a portable USB.
00:20:36Now, this may seem a little obvious, but if you've ever wondered what all the notches are in a car
00:20:41tire, it's for traction on the road. However, there are also a good indicator if your tire is getting
00:20:48too worn down. If those notches aren't so deep anymore and are almost flush with the road, it's
00:20:55time to replace them. If you don't, the next time you try to stop suddenly at a stop sign,
00:21:00you might be surprised to find your car has turned into a giant roller skate.
00:21:06Those takeaway containers most associated with Chinese restaurants are designed to not only carry
00:21:12your food home, but to store them in the fridge. They double as a plate, as you can eat straight
00:21:18out of them and don't have to worry about dirty dishes. Yay! They were actually patented way back
00:21:25in 1894 to transport freshly shucked oysters and were known as oyster pails. They were later adapted to
00:21:33use as leak-proof containers for food. While you're sitting on an airplane and looking out the window,
00:21:40you may have noticed those little holes, or in some instances, a small singular opening near the
00:21:46bottom. This is called a breather hole, and no, it's not for you. It's designed to equalize the
00:21:52difference in air pressure which builds up between the pressurized cabin and the atmosphere outside,
00:21:57especially during high altitudes. It also releases moisture from between the panes to avoid frost
00:22:05from forming on the windows and obstructing that all-important view. Sorry, but it looks like you
00:22:11won't be drawing a smiley face on it anytime soon. This was first introduced way back in 1956 by a
00:22:18company
00:22:19in Japan. Pretty cool, huh? They got their inspiration from snap-off rows on chocolate bars. Just don't get the
00:22:26two mixed up. One doesn't taste good. When it comes to measuring tape, almost every reel has an empty
00:22:34slot in the metallic end. This is called a nail grab, so you can attach it to a nail or
00:22:40screw. A handy
00:22:42trick to do measurements without requiring someone else to hold it in place. Ooh, very nifty.
00:22:49Bobby pins have grooves on one side to hold your hair in place better. Crazy notion, huh? The straight
00:22:56side goes face up while the grooves go down against your head. They're called bobby pins because of
00:23:02the bobbed hairstyle which was popular in the 1920s, though the pins were invented in the 19th century.
00:23:09The look is gone, but the pins remain. Please take them out before you wash your hair as they don't
00:23:16look great stuck to your fingers. If you've been in a car or a bus and noticed the textured black
00:23:22dots
00:23:23baked into the black edges, you've probably worked out that it's not there for its pretty looks.
00:23:28It's called FRIT, a ceramic paint. Its main purpose is to protect the window from ultraviolet rays.
00:23:36It also creates a rough surface for the adhesive to cling to.
00:23:40Now, if you see a pink lump of adhesive in the corner, please do not touch it. It's actually someone's
00:23:47old bubble gum. If you take a look at the bottom of the lock, chances are you'll see one or
00:23:54two
00:23:54little holes. This is to let water out from the inside that may have been trapped due to rain.
00:24:00This mini-draining capability prevents the inner working from rusting over or freezing in place if
00:24:07the weather is very cold. If, in another situation, the lock becomes stuck, you can ease an oil-based
00:24:14product inside to lubricate the lock and get it working again. If you've lost the key and want to
00:24:22ease your frustrations, you can yell into the holes. It won't do anything to unlock it, but it may help
00:24:28you feel a little better. Some dress shirts have a fabric loop on the back. You guessed it, it's used
00:24:35for hanging the shirt up. The loops were reportedly first used in the navy, as it was easy to simply
00:24:41hang
00:24:42them on the wall. During the 1960s in colleges, the fashion of the day was to wear the shirt buttoned
00:24:49all the way to the top, which made them difficult to hang. So designers began putting the loop on the
00:24:55back. If the student removed the loop, it signified that they were going steady in a relationship.
00:25:01Unless your friend ripped one off for a prank, now everyone's asking whom you're with.
00:25:06There's a little more to this story, but we haven't got time to hang around.
00:25:12And yes, that's a bad pun. On purpose. It's what I do.
00:25:17Ever wondered why coins have those little ridges along the edge? It's a leftover from earlier times
00:25:24when they were worth more. Counterfeiters could easily file the edges off to sell as gold or silver
00:25:30coins to make some profit. The ridges were created so it was much easier to tell which of the coins
00:25:36had been altered. It's not needed today, but the coins still have that altered style. If you ever
00:25:42get really bored, you could try counting how many ridges there are. Actually, that is a very boring
00:25:49idea. Forget that and watch another Bright Side video instead.
00:25:56Tires on the landing gear don't burst because they're designed for a load that's four to five
00:26:02times as great as they experienced during landing. The wheel itself might break, but the tire won't
00:26:07burst. This little tip based on people's psychology can help you choose the fastest line at the airport.
00:26:14If there are several lines at check-in, opt for the left one. It's believed that you'll get to the
00:26:20counter more quickly this way. Most people are right-handed and intuitively choose the right side.
00:26:27Your skin usually becomes a bit dry during the flight. This happens because of low humidity levels
00:26:33in the cabin. Bring a good moisturizer with you to keep your skin hydrated on board.
00:26:38Do you know that airplane pilots always eat different meals before a flight?
00:26:43This way, if one of them gets food poisoning, the other will be able to take control of the plane.
00:26:50Airplane tray tables are some of the dirtiest surfaces in the cabin, so make sure to wash your
00:26:55hands frequently. And clean that table with an antibacterial wipe to get rid of all those bacteria
00:27:00living there. If you're sitting in an aisle seat, you can have more space to stretch your legs out.
00:27:06Just push the button on the underside of the outermost armrest. This will move the armrest up,
00:27:12giving you more space for your legs and preventing the armrest from jabbing into your side.
00:27:17Here's a reason why they turn the lights off in the cabin. Passengers need to get used to the
00:27:22darkness in case an emergency landing happens at night. This way, their eyes are already used to the
00:27:28absence of light, which makes it easier to evacuate. Flight attendants ask you to open window shades so they
00:27:35can see what's happening outside. This way, they can choose the best way to evacuate passengers in
00:27:41case of an emergency. Almost all passenger planes are white, since this color best reflects the sun's
00:27:48rays and prevents the plane from heating up. Another good reason is that white paint is cheaper. Also,
00:27:55workers and engineers can easily notice any damage on a white surface. It's better to avoid making
00:28:01important decisions during a flight. Your brain doesn't get enough oxygen at such heights. This
00:28:07negatively affects its functioning. Chewing gum, hard candies and mints can help you to avoid this
00:28:14annoying ear popping during takeoff and landing, but not because of the candy itself. You feel better,
00:28:20thanks to the process of swallowing. Yawning helps too. As for the gum, it also helps get rid of that
00:28:27bad
00:28:27breath caused by the thin air at high altitudes, which pulls moisture right out of your body. Dry air
00:28:34can make you feel as if you're coming down with a cold. The air in the cabin dries out your
00:28:39nose and
00:28:39throat as if you have symptoms of a cold. These symptoms usually go away right after landing. The water
00:28:47they use to make coffee and tea on board isn't always clean enough. Yeah, many companies use very
00:28:53good water filters now. But still, it's better to ask for bottled water if you're thirsty.
00:28:59That tiny triangle on the aircraft wall over your seat means a lot for flight attendants.
00:29:05These triangles mark the windows through which you can see flashing indicators. Those signal the
00:29:10retraction of the landing gears and the closing of the flaps. Let's say the pilots find out there's
00:29:16some problem. In that case, a flight attendant rushes to the necessary window to check what's
00:29:21happening. But for passengers, this is just the best place for photos since you can see the wings
00:29:26perfectly. Seats in the middle of the cabin above the wings are the best for you if you have motion
00:29:32sickness. This area is more balanced and shakes the least during turbulence. If you tend to get nervous
00:29:38during the flight, do some physical exercise not long before boarding the plane. A little workout helps
00:29:44lower your stress levels and makes your body release endorphins, the happiness hormones. Also, this
00:29:50physical activity compensates for the hours you spend sitting still. The turbines are located under
00:29:56the wings since this makes it cheaper, faster and easier to service the engines. Previously, they used to
00:30:03be placed in the tail. It required expensive equipment and much more time to repair. When they started
00:30:09installing the engines below the wings, ticket prices went down. Imagine you're flying in a hot air balloon.
00:30:15See the burner system installed under the gas bag, also called the envelope? It heats the air inside,
00:30:22which makes the balloon go up. So, turbulence is the same hot air but created by nature. When the air
00:30:28heats up,
00:30:29it rises a plane. When it becomes cooler, the aircraft goes down. And passengers feel as if they're riding a
00:30:36roller coaster. A stream of hot air left by another plane can also cause turbulence. It's common for
00:30:42most flights, but usually, turbulence is so light that passengers don't feel it. Do you know that planes
00:30:48can fly even after one engine fails? Pilots can control such emergency situations and land the aircraft
00:30:54safely. Passengers may feel a slight tilt during the flight but in most cases, they don't even know the
00:30:59plane is flying with only one engine. Your eyes get oxygen straight from the air. It's not delivered by
00:31:06the blood, so your eyes can feel somewhat dry during the flight. Put eye drops in your bag. They'll help
00:31:11you keep your eyes moist. It's forbidden to carry large volumes of liquids on board because some
00:31:17hazardous substances can easily dissolve in water. If a plane has to land on water, its wings become a
00:31:24life-saving pillow. Empty fuel tanks help the aircraft stay afloat too. By the way, it can be from 10
00:31:30minutes to 60 hours before the plane sinks. It all depends on the model, weather conditions, and the
00:31:36pilot's skills. Those smiling flight attendants you meet when you get into the cabin usually hide
00:31:41their hands behind their backs. They're counting people entering the plane to make sure that all
00:31:46passengers are on board. Despite all the words people say about airplane food, it's not actually
00:31:51so bad. The problem is your sense of taste. It's not so acute since the air in the cabin makes
00:31:57your
00:31:57mouth dry. It also dulls your sense of smell. That's why airlines add a lot of spices and salt to
00:32:03their
00:32:03meals. Is it true that your hair grows faster during the flight? Not really. Scientists haven't
00:32:10managed to prove it. This myth appeared in the first part of the 20th century when some passengers
00:32:15noticed that their stubble had grown longer during the flight. It's normal for people to get headaches
00:32:20during the flight, especially right after takeoff. You climb to an altitude higher than Mount Everest
00:32:26within about 10 minutes. These changes happen too fast for your body to adjust. Seat belts on planes
00:32:32stretch across your stomach to save you from getting slammed against the ceiling in case of
00:32:37turbulence. When it happens, the aircraft starts moving up and down and your waist belt holds you
00:32:43securely. And seat belts in cars protect people from horizontal collisions. Airplanes have special
00:32:50protection from lightning. Even if it strikes, passengers won't feel it. Planes are covered with an
00:32:55aluminum coating that conducts electric current but doesn't let it get inside the plane. Electronics and
00:33:01fuel tanks also have extra protection. Plane seats are so uncomfortable because airlines try to fit the
00:33:08maximum number of passengers on the plane. That's why there's so little space between seats. Two
00:33:14additional rows means 12 more passengers. Also, companies make airplane seats lighter to save on fuel
00:33:21costs. Even seemingly insignificant extra weight can cost an airline thousands of dollars. And by the way,
00:33:28your seat has a fire-resistant coating. It's necessary to prevent a fire from spreading in case of an
00:33:34accident. Airport workers transport unclaimed luggage to special centers. If the owner doesn't show up
00:33:41within three months, the baggage is put up for sale in specialized stores. You couldn't use your phone on
00:33:47an airplane in the past since cell phones were really dangerous for navigation. Their radio signals could
00:33:53disrupt the settings in aircraft electronics. Oxygen masks fall down not only during strong turbulence,
00:33:59but also when the air pressure inside the cabin changes dramatically. Passengers are okay if they
00:34:05put on their oxygen masks, but in such cases are considered to be an emergency. And pilots do their
00:34:11best to quickly go down to a safe altitude so that passengers can breathe without oxygen masks.
00:34:20Whether it's something as simple as a button on your jeans or something that's part of a larger
00:34:25moving mechanism, here are 26 secrets to everyday things you probably didn't know about.
00:34:32You use doorknobs every day, so it's right to be concerned about how many germs could be on them.
00:34:38However, they have made doorknobs out of brass partly for that reason. Brass provides an antimicrobial
00:34:45effect, eliminating the microorganisms that were hoping to start a colony on your doorknob.
00:34:51Your pants have that one-fifth pocket that's recognized as the small useless one. Originally,
00:34:57it was there to provide a safe place for your pocket watch, something that was necessary when
00:35:02first implemented in 1901. It then continued to remain for traditional purposes. However, it's still
00:35:08a great place to put your Tic Tacs. You've probably mistaken those little rivets on your jeans
00:35:14as some form of fashion statement, similar to the small pocket. In fact, they're incredibly important.
00:35:20They are there to provide extra support for areas that withstand the most strenuous parts of your
00:35:26clothing, preventing them from embarrassingly falling apart. That little button at the end of your seat
00:35:33belt seems like it's way out of place. In fact, it's there to ensure your buckle will always remain at
00:35:38the end, so you won't have to awkwardly fiddle with your seat belt every time you put it on.
00:35:44You're in a new car or a rental, and the gauge tells you the gas is getting low. You don't
00:35:50know
00:35:50which side the fuel cap is on from the inside. It can cause unnecessary effort at the gas station.
00:35:55However, your fuel gauge has an arrow that reminds you which side to fill your gas tank up from.
00:36:02Some models of cars may also have a gas tank hose instead, with the hose pictured on the side that
00:36:08the cap is on. Hiking and walking through snow requires the best kind of footwear. The shoes which
00:36:16are perfect for this also have an extra eyelet for your lace to loop through. Looping your laces through
00:36:22the extra eyelets will give more support for your ankles and feet, and will provide more stability as you
00:36:28walk. But as you walk, blisters are also a concern. The sweat in your shoe creates friction between the
00:36:36feet and the shoe, which then helps create the blisters. Antiperspirant that you use for your
00:36:41armpits will help keep the feet from sweating. Just make sure you use the clear one. Cooking for people
00:36:48is always nice. However, sometimes the guests are late. Yep, we're all guilty of that sometimes, right?
00:36:56The extra drawer under your oven, where you've been keeping all of your spare pots and pans,
00:37:02was actually made to keep your food warm. Great for those who are late to the meal.
00:37:07Ever wondered how long that padlock could possibly last when it's outside,
00:37:11in the rainy weather, keeping your bike safe? It has a little hole at the bottom of it. It's there
00:37:18to
00:37:18drain water to avoid corrosion on the inside. It also serves to provide oil, further prolonging its use.
00:37:26That hole in the elevator door isn't there to check who's inside so you can avoid sharing a ride
00:37:32with specific people. It's a keyhole, in case it breaks down.
00:37:37Ketchup, sauce bottles, and all other condiments we love all have a stage when it's difficult to get
00:37:42the insides out. You try hitting it, shaking it, and poking things inside to encourage the tasty
00:37:49condiments to come out. Luckily, there is an easier way to do it. The label at the top suggests where
00:37:56to tap the bottle. The sauce will come out easier and smoother, allowing gravity to take the place
00:38:03of frustration. The purpose of wooden coat hangers is to help repel pesky insects and avoid fungal growth
00:38:11that eats away at your clothing. As it's made of cedar wood, it contains oils that have insecticidal
00:38:17and fungicidal properties and were used as far back as the ancient Egyptians, although they used it for
00:38:24other purposes. We've all been trained and tested at the art of typing and know the correct way to use
00:38:32a keyboard. But you may not have noticed that the F and J keys have a small ridge at the
00:38:38bottom.
00:38:38They're there to help you find your correct starting place with your fingers on the keyboard,
00:38:43without having to look down. If you've been lucky enough to get the window seat on the plane,
00:38:49you would have noticed that little hole at the bottom of the window. It helps with the air pressure
00:38:54on the plane. The window itself is made from acrylic and isn't actually glass, which saves it from fogging
00:39:01up so you can see the scenery on your journey. The windows on planes were originally square,
00:39:07however, they would continuously break from the constant changes in pressure. Round windows are
00:39:13able to evenly distribute the pressure, ensuring you'll have a pleasant journey without falling out.
00:39:18For all you Nintendo Switch players, those who have tried to taste your cartridges will notice they
00:39:24have a bitter taste. The manufacturers added it intentionally, as the Switch's cartridge size
00:39:30is very small and it might be a hazard for the youngest players that have a tendency to put things
00:39:36in their
00:39:36mouth that they shouldn't. So the bitter taste made from Denetonium Benzoate ensures that they won't be
00:39:42tasted for too long. Cosmetics containers that are filled with products used for your skin have a secret
00:39:49number on them. This is to help inform you how long the product will be usable, ensuring it doesn't cause
00:39:57the
00:39:57reverse effect by damaging your skin instead. Pen lids have a hole at the end of them. It's not there
00:40:04to
00:40:04help your pen breathe and boost performance, but it's there to help you breathe. Just in case while you're
00:40:10sitting in class or at work and you're chewing on your lid and just happen to swallow it, you can
00:40:16be rest assured
00:40:17if it's stuck, the pen makers were thinking of you. When you're traveling by car or any other form of
00:40:24ground
00:40:24transportation and you're trying to drink your favorite pop from a straw, you'll find it quite
00:40:29difficult to do at times. Simply turn the tab on the can around so that your straw easily fits inside,
00:40:35making it easier to drink out of. There are always spare buttons when buying new clothes along with a
00:40:43little bit of fabric. It's far too small to repair that crutch part that always rips first. The fabric is
00:40:49actually there for you to test how to wash it, so you don't accidentally ruin your brand new clothes.
00:40:56Determining how much pasta you need just for yourself can be difficult to figure out.
00:41:00Your big spaghetti spoon with the big hole on the inside, that looks like it's there to drain water,
00:41:06is actually there so you can put the uncooked pasta inside before cooking, so you know exactly how much
00:41:13you need. New shoes always come with those strange little packets, that silica gel. The gels are there
00:41:20to reduce the moisture in the air to avoid any fungal growth while the shoes were waiting to be purchased.
00:41:26There's a lot of chemistry involved to get you that silica, and it's very effective, capable of absorbing
00:41:3250% of the humidity. So make sure you don't throw it away. Next time you need to dry out
00:41:38your electrical
00:41:39devices, it's a lot easier than using rice. It's difficult enough to see at night whilst driving,
00:41:46but it's even worse when the driver behind you shines their high beams. Your rear view mirror
00:41:51has a tab at the bottom. When you press it, it changes the angle. One is for day driving, the
00:41:57other,
00:41:58well, for night time. It'll help in case that one person driving behind you has forgotten to turn off
00:42:03their high beams. Although your screwdriver is ergonomically made for your hand, sometimes you
00:42:09have that one screw that's too hard to loosen up. The handle is also shaped so you can easily fit
00:42:16inside of a ring spanner or wrench, allowing you to apply more force, ensuring that you can remove that
00:42:22troublesome screw. The skirt part on an escalator seems like a good spot to get your foot stuck,
00:42:27but in reality, those long brushes poking out aren't there to give you an extra shine on your shoes,
00:42:33but for safety precautions to minimize the risk of trapping objects between the steps and the side of
00:42:39the escalator. Pouring milk into your tea or coffee can make a mess if you don't do it the right
00:42:47way.
00:42:51If you want to pour it with the opening closer to the cup, stop right there, turn it to the
00:42:56other side,
00:42:57and then pour. The flow will be much smoother this way, and you won't have to deal with wiping the
00:43:02table afterwards. Hey, I'm bossy, get over it. It's all about the physics of it. If you turn the
00:43:08carton's opening toward the cup and the carton is full, while the milk's escaping through the opening,
00:43:14the air from the outside will try to get inside the carton to fill the empty space. Since there's only
00:43:20one place where it can do that, the air will push the milk back and disrupt the flow. When you
00:43:26turn
00:43:26the carton to the other side, there will be empty space along with the top side of the carton,
00:43:31and the air will have it easier getting inside. So, the flow will be steady, and you won't have
00:43:37that annoying spurting anymore. Now, the handrails are usually moving faster than the escalator itself,
00:43:44because the gear wheels that drive the handrails are intentionally made a bit larger than required.
00:43:50The rubber on those wheels tends to wear off with time, so if the handrails are moving at the same
00:43:55speed as the steps, or even slower, then you're riding a rather old escalator. Now, speaking of
00:44:02escalators, and I was, at subway stations with three or more of them, the majority will be going in a
00:44:08different direction depending on the time of day. For example, in the city center, there will be two or more
00:44:14escalators going up in the morning and down in the evening, and vice versa at the outskirts. This is done
00:44:20to make it easier for passengers to get around. Most people only work downtown while living far from the
00:44:26center, so they go to work in the morning and find more escalators moving in the direction they need. How
00:44:33convenient! If you were ever worried about how the pilots find their way in the dark when landing at night,
00:44:40well, you can rest easy now. There's an incredibly complex illumination system on the ground that helps
00:44:46the crew navigate the airplane. And it's not just the red and white lights along the runway.
00:44:51The lights actually start popping up long before the runway, so that the pilots can easily find their
00:44:57way. And different patterns mean different things, which your captain and their co-pilot know by heart.
00:45:03Every commercial airplane you've been on has only one wing. The first airplanes were called biplanes,
00:45:09because they had two wings, one on the top and the other going through the bottom of the fuselage.
00:45:14They were connected with struts and wires, which made kind of a box that basically allowed the craft
00:45:20not to fall apart in the air. How thoughtful! It was necessary at lower speeds than earlier planes
00:45:27could only muster, but as the engines increased in power, the second wing became redundant and
00:45:33repetitive. The single wing still serves as a support for the whole structure, though.
00:45:39Going 100 miles an hour on an interstate makes you feel the drive and excitement of speed.
00:45:45Flying at nearly 600 miles per hour makes you drowsy at best. This is because you don't feel the actual
00:45:52speed of anything. You can only see how fast you're moving relative to other objects. The closer,
00:45:58the faster. In a car, everything's close to you. So you see trees, people, houses, witches,
00:46:04porcupines, and other cars zapping past you. On board a plane, everything's so far away that it
00:46:10seems to go at a snail's pace. Now take a good look at your smartphone. It might never have occurred
00:46:17to
00:46:17you, but its rectangular shape is no accident. And it's actually what you want it to be. Rectangle is
00:46:24the most convenient shape for a screen. It has an orientation, so you can flip your phone all you
00:46:30want and it will adapt. Imagine that with, say, a round-shaped display, you'd have to always turn
00:46:37it in your hands until the top is where it belongs. Next, it fits into your pocket nice and cozy.
00:46:44The
00:46:44pocket is deeper than it is wide, so a phone longer than it is broad will sit there perfectly. A
00:46:51square or
00:46:51circular phone will be more of an inconvenience. Then again, a rectangle is much easier to handle.
00:46:57It fits in your palm, and it feels better than a circle or a square. And finally, we're used to
00:47:04having rectangular things all around us. Pictures, sheets of paper, books, SpongeBob, photographs.
00:47:11Having round-shaped screens would have been just weird. Still, there have been attempts to create
00:47:17circular and square smartphones, but as you can guess, they didn't catch on. Taking photos in the
00:47:24dark with a flash, you must have noticed your smartphone flashes several times before making
00:47:29the actual shot. Remember those horrid red eyes in old photographs made on film or digital cameras?
00:47:36That happened exactly because the camera flashed only once. In the dark, the pupils of your eyes become
00:47:43larger, trying to catch more light to see better. And when they reflect the camera's flash,
00:47:49the red-eye effect appears. With smartphones, the first short flash makes the pupils contract from
00:47:55bright light, and only then the device takes a shot, and you don't resemble a horror movie creature anymore.
00:48:03There are two main reasons why there are no public bathrooms in the subway – safety and financing.
00:48:09They're ridiculously expensive to maintain, so I guess we won't be seeing many of such cabins where
00:48:16they weren't before. And the second reason is security concern, since there can be no cameras
00:48:22installed in the bathroom, and any kind of suspicious activity would go unnoticed.
00:48:27It seems only natural that a vehicle that carries so much more people than a car should have seatbelts.
00:48:33But buses have none – even school ones. In fact, it has to do with several things at once.
00:48:40First of all, in case of emergency, passengers need to get off a bus as fast as possible.
00:48:46With seatbelts on, they'll waste precious time on unbuckling them.
00:48:50Secondly, a bus is a big and heavy vehicle. On the road, there are not many other members
00:48:56of the traffic that weigh more than a public bus. So, in case of a collision, a bus would stop
00:49:02much
00:49:02slower than a car. And even though its passengers will certainly feel the impact,
00:49:07they normally won't get hurt as much. That's also the reason why passengers are allowed to ride
00:49:12standing, too. If your hotel has card keys with magnetic strips, make sure you put your card key
00:49:20apart from your cell phone and wallet. The problem is that card keys are rewritten quite a lot,
00:49:25and they're designed for that process to be quick and easy. So, a fairly strong magnet,
00:49:31like the one in your cell phone, can erase your key card, and you won't be able to get back
00:49:36inside
00:49:36your room. The hotel will surely provide you with a new card, but that's still inconvenient.
00:49:43If you're struggling to get your taco shells to stay in place, use a muffin tray. Flip the tray upside
00:49:49down,
00:49:50spray it with oil, and place your tortillas in the gap. Cook them for around 10 minutes at 700 degrees
00:49:56for the perfect crispy taco shell. Now I'm getting hungry. You? Looking for a lost earring or pin on
00:50:04the floor? Place a stocking over the end of your vacuum and move it over the floor. The small object
00:50:10will get picked up without getting vacuumed. It helps to turn the vacuum on while attempting this.
00:50:17Candle wax that's been spilled on furniture can be removed with ice cubes. Rather than ruining
00:50:23the finish by trying to scrape it off, fill the plastic bag with ice and let it sit on the
00:50:28wax for
00:50:29a few minutes. The wax will then cool and harden, making it much easier to pick off. Crayon marks on
00:50:36the walls are a parent's worst nightmare, but you can use a hair dryer to get them off. Heat the
00:50:41marks for
00:50:42just a few seconds to soften the wax and then you should be able to just wipe it away. You
00:50:48can use
00:50:49hair conditioner to make that new wool sweater less itchy. Just soak it in lukewarm water with a couple
00:50:55of tablespoons of conditioner and leave it for 15 minutes. Then just dry it and your sweater will be
00:51:01much softer. That layer of bubbles that forms when you add bubble bath to your tub isn't just for fun.
00:51:07The bubbly layer also acts as insulation and keeps your bath warmer for longer.
00:51:14Next time you're getting ready for work, take a closer look at your go-to shirt.
00:51:19Every buttonhole is stitched vertically, but check out the very last hole. It's stitched horizontally,
00:51:25right? This is because the bottom part of your shirt endures the most stress from pulling as it's where
00:51:32your hips are. So that horizontal buttonhole isn't a mistake. It's put there to stop your shirt
00:51:38ripping as your hips move. Hey, those hips don't lie. That random diamond on your backpack is called
00:51:45a lash tab or pig snap. It's there so you can thread cords through the holes to carry extra gear,
00:51:52perfect for camping or long hikes. If you put your Chinese takeout on a plate when it arrives,
00:51:58you're doing more work than you should. Much like the paper condiment pots in fast food restaurants,
00:52:04your cardboard Chinese takeout box can be unfolded to create the perfect size plate for your food.
00:52:11That hole in your hollow lollipop stick isn't to prevent choking should it ever be swallowed.
00:52:16It's actually there to keep the candy in place. Excess candy flows into the hollow tube and the hole,
00:52:22which, when it hardens, keeps the pop in place. If it was a smooth stick, the candy would slide off
00:52:29easily. Some skyscrapers have hollow floors that contain nothing but an elevator and some complex
00:52:35machinery. They're called technical floors, and developers say they're there to maintain the
00:52:40building's proper functioning. But it's also a way to get around height limits. Some skyscrapers are
00:52:47given a limit to the number of floors they can have. Because the technical floors are non-residential,
00:52:52they add to the height of the building and make it look more impressive without increasing the
00:52:57number of floors and breaking the building contract. These floors can also help to prevent the spread of
00:53:03fires. If you look closely at an elevator door, you'll notice a tiny hole. This is actually a keyhole
00:53:10used for emergencies or for routine maintenance checks. If you get stuck in an elevator, the technician
00:53:17will be able to get you out of there by using their master key. Salt isn't just used for cooking.
00:53:23It can get rid of tough smells! Like this! Phew! Rubbing salt on your fingertips after chopping garlic
00:53:30should remove the smell. It also works on shoes. Toasters have a secret slide in the bottom that can be
00:53:37removed, so you can clean out all those annoying breadcrumbs. Now, take a look at your laptop keyboard.
00:53:43There are bumps on the F and J keys, but nowhere else. When your fingers are in the optimal typing
00:53:50position, your index finger should rest on these two keys. The bumps have been added so that you can
00:53:55correctly position your hands for typing without looking at your keyboard. Washing your clothes on a
00:54:01low heat or even better, a cold wash, will make them last twice as long. Drying them on a line,
00:54:07if possible,
00:54:08will also make the material last longer than if you used a dryer. The less you wash them, the less
00:54:14they'll fade and shrink over time. It'll also save you on your energy bills. Blank pages in the books
00:54:21aren't actually made for the author's signature. It's all about the manufacturing process. Books are
00:54:27printed on large sheets, so one sheet can fit four printed pages. If a book has an odd quantity of
00:54:33printed pages, chances are you'll get a blank one for notes. Tree cart loops have more functions than
00:54:40you think. You don't want to put your fancy white jacket in a cart next to carrots and coke. This
00:54:46little hook-like thingy helps organize all the stuff in your cart better, so you can enjoy your shopping
00:54:52trip. Works for me. A good doorknob is one made of brass, bronze, or some copper alloys. These
00:55:00metals have an anti-germ effect. Bacteria spread way slower on them. They also get rid of germs pretty
00:55:07fast, within a couple of hours. There's only one way you can store your peanut butter right. If you
00:55:13place it the regular way, it may get a bit solid before long. The trick is to store it upside
00:55:19down,
00:55:20so the oils don't stay on the bottom all the time and distribute evenly. Hmm, my dog loves peanut
00:55:27butter. How about yours? Whatever coffee shop you go to, all the disposable cups look exactly the
00:55:34same, only the logo changes. The secret here is the special shape that lets you enjoy your drink easily.
00:55:41The top is always wider, which allows it to accommodate your nose while you're drinking,
00:55:46and the bottom is always narrower, so that anyone can hold it easier, even if the hand is quite small.
00:55:53This width difference also allows the cups to stack.
00:55:57Spoiled milk emits gases, like most foods when they go bad, or me. A classic plastic milk jug has a
00:56:05concave shape on one side, so when the gases expand inside the jug, it expands too, and the concave shape
00:56:13curves out.
00:56:14Also, if you want to save some milk for later and freeze it, the jug will expand when the milk
00:56:20gets
00:56:20solid as well, occupying more space in a jug. Almost all measuring tapes have a metal tip with a small
00:56:27slot on the end. You can use this slot to hang the tape on a nail or a screw to
00:56:32make measurements without
00:56:34anyone's help. Sometimes this tip has a row of sharp points along the edge on one side. It comes in
00:56:40handy
00:56:41when you want to leave a mark without using a pencil. If you've ever tried a Nintendo cartridge to taste,
00:56:47you'll confirm that they taste revolting, leaving a sour, bitterish aftertaste in your mouth.
00:56:53Well, we tried to tell you. They're covered with denotonium benzoid, one of the most disgusting flavors
00:57:00now. Not normally seen in ice cream stores either. Actually, this taste has a righteous function.
00:57:06It prevents people from swallowing those cartridges.
00:57:10Rough edges on the dives are just about design. The coins used to be made of precious metals to show
00:57:16their real value. People would shave off the edges, spending the shaving coins with the same value,
00:57:22and melt the edges to new coins. To avoid it, Minters added that pattern so people could tell
00:57:28if someone cut that coin before. A triple handle on a jerry can is there to make it easier for
00:57:35two
00:57:35people to carry it and distribute the fuel evenly. Lemons get juicier if you warm them up a little bit
00:57:42in
00:57:42the microwave. The heat softens the frozen membranes, so the juice can flow out freely.
00:57:48The result? More lemonade for you! The expiration date on mineral water isn't about water going bad.
00:57:56Actually, no water can spoil, but the bottle can. Over time, it starts leaking some chemicals that
00:58:03aren't quite safe. Okay, here's a science project to try. Tonic water can be fluorescent in UV black light.
00:58:11It contains quinine, which makes it both bitter and glowing. The color of plates and cups can affect
00:58:18your food perception. A group of 57 volunteers drank hot chocolate out of different cups,
00:58:25but most people claim the orange cup hot chocolate was the best. Red color plates are cool for those on
00:58:31a diet. It looks alarming, so you end up eating less. Okay, I'm gonna go do the tonic water black
00:58:38light thing. Bye!
00:58:42Next time you're getting ready for work, take a closer look at your go-to shirt. Every buttonhole is
00:58:48stitched vertically, but check out the very last hole. It's stitched horizontally, right? This is because the
00:58:54bottom part of your shirt endures the most stress from pulling, as it's where your hips are. So that horizontal
00:59:00buttonhole isn't a mistake. It's put there to stop your shirt ripping as your hips move. That layer of bubbles
00:59:07that
00:59:07forms when you add bubble bath to your tub isn't just for fun. The bubbly layer also acts as insulation
00:59:13and keeps your bath warmer for longer. The pom-pom on top of your beanie wasn't put there as a
00:59:19fashion
00:59:19accessory. The pom-pom was originally added to the hat to prevent sailors banging their heads on the
00:59:25ceilings of the ships that were too low. Crackers have holes in them to stop them cracking and breaking
00:59:31during baking. If the holes weren't there, steam would build up inside the cracker and make it
00:59:37collapse. Those numbers on stickers they put on oranges aren't random. If there are four digits,
00:59:43and the first is three or four, this means the fruit has been made with conventional farming techniques.
00:59:49Five numbers, beginning with an eight, means the fruit has been genetically modified.
00:59:54Five numbers, beginning with a nine, means the fruit is organic.
00:59:59Margins on paper aren't for writing in dates and numbering lists. They were originally added to serve
01:00:04a protective function. Back in the day, rats used to be a pesky problem in people's homes,
01:00:09and paper was one of their favorite snacks. Margins were added as a safeguard,
01:00:14so that the rats would nibble on blank paper rather than taking a bite out of your important work.
01:00:20If you put your Chinese takeout on a plate when it arrives, you're doing more work than you should.
01:00:25Much like the paper condiment pots in fast food restaurants, your cardboard Chinese takeout box can
01:00:32be unfolded to create the perfect size plate for your food. The long neck on your soda bottle is
01:00:38designed like that to encourage you to hold it there. That way, the heat from your hand will only warm
01:00:43that top bit of the bottle instead of heating up your whole drink.
01:00:48Why does a lapel have a buttonhole with no matching button? Originally, coats and jackets did have a
01:00:55corresponding button so that the wearer could turn up the collar and fasten it around the neck to keep
01:01:00warm. Over time, people stopped doing this, and the button was removed. But many suit makers still
01:01:05keep the non-functioning traditional buttonhole. It's always hard to see your food in the microwave
01:01:11because of that pesky black grate on the window. But it's there to stop harmful microwaves escaping.
01:01:17Called the Faraday shield, it protects you as well as ensures that your food cooks properly.
01:01:23That random diamond on your backpack is called a lash tab or pig snout. It's there so you can thread
01:01:30cords through the holes to carry extra gear. Perfect for camping or long hikes. Golf balls are covered in
01:01:37dimples, rather than being perfectly round, so that the ball can fly through the air more smoothly,
01:01:42decreasing the drag and allowing it to travel further and faster. Your makeup pads have two
01:01:48different sides for a reason. The bumpy side is used for applying makeup, while the flat side is for
01:01:54removing it. Donuts have holes so that the inside and outside cook evenly. Before the holes were added,
01:02:01the inside would often be greasy and doughy, while the outside was crisp. Your Apple laptop charger has
01:02:08tiny legs that can be folded out, and they're not there so your charger can stand up. These legs,
01:02:14when unfolded, allow you to wrap the cable around and then clamp it into place, securing it and
01:02:19preventing the cable getting tangled or damaged. Now take a look at a soda bottle, and you'll notice a
01:02:25disc inside the bottle cap. This helps seal in the liquid and the drink's fizz, stopping it from going
01:02:32flat. That hole in your hollow lollipop stick isn't to prevent choking, should it ever be swallowed.
01:02:38It's actually there to keep the candy in place. Excess candy flows into the hollow tube and the hole,
01:02:44which, when it hardens, keeps the pop in place. If it was a smooth stick, the candy would slide off
01:02:50easily.
01:02:52The zipper on leather biker jackets is often sewn diagonally. It's not just a fashion statement.
01:02:58Zips that are stitched vertically can bunch up if the wearer leans forward, but a diagonal zipper won't.
01:03:04That little triangle on your gas gauge is there to let you know which side of the car your gas
01:03:09cap is on.
01:03:10Now you'll never pull up to the wrong side of the pump in a rental car again.
01:03:15Vacuums come with so many attachments, but do any of us really know what that one with long bristles
01:03:22is for? It's for dusting, and it's perfect for cleaning framed art, blinds, and lampshades.
01:03:28Those tiny holes in the chocolate box tray actually serve a function. Push the hole near the candy,
01:03:34and it'll pop straight out with you having to get your hands dirty. How thoughtful.
01:03:39Some skyscrapers have hollow floors that can contain nothing but an elevator.
01:03:44It's actually a way to get around height limits. Some skyscrapers are given a limit to the number
01:03:49of floors they can have. Because the hollow floors are empty, they add to the height of the building
01:03:54and make it look more impressive without increasing the number of floors and breaking the building
01:03:58contract. These hollow floors also help to prevent the spread of fires.
01:04:05Women's shirt buttons are traditionally on the left for a reason. Back in the day,
01:04:09it was a sign of wealth, as it signified that a chambermaid had dressed you,
01:04:14as having the buttons on the left made it easier for them to do up the shirt.
01:04:18Your cuticles serve a purpose, so think before you get rid of them. The small area of skin is there
01:04:24to protect your nails from infection. Without it, bacteria and fungi can get in.
01:04:31What's the difference between a wooden hanger and a plastic one? Aside from helping keep your
01:04:36clothes in shape, cedar wood hangers also repel moths and bugs. If you look closely at an elevator
01:04:43door, you'll notice a tiny hole. This is actually a keyhole used for emergencies or for routine
01:04:49maintenance checks. Those random buttons dotted across your jeans are called rivets and are placed
01:04:55in the weakest spots of the jeans to protect them from ripping due to strain or movement.
01:05:01The Statue of Liberty's crown has seven points for a reason. They represent the seven seas and
01:05:07seven continents and were added so that she could extend her freedom to everyone on earth.
01:05:13Suitcases often come with two zippers so that you can connect them with a padlock to prevent theft.
01:05:19Salt isn't just used for cooking. It can get rid of tough smells. Rubbing salt on your
01:05:24fingertips after chopping garlic should remove the smell. It also works on shoes.
01:05:29If you're in a hurry to get somewhere but your phone is low on charge,
01:05:33switch it to airplane mode while it's plugged in. It'll charge much faster.
01:05:39Men's shirts have a loop on the back so that they can be hung on a hook in a dressing
01:05:44room or a locker
01:05:44room without creasing. Vaseline has a hidden purpose. It's great for removing scuffs from patent leather
01:05:51shoes. It'll also shine them. Trunks have an emergency latch if you ever accidentally lock
01:05:57yourself in. Like I do. Don't ask me why. If you fumble around to locate it, all you have to
01:06:03do is pull on
01:06:04it and the trunk should open. Toasters have a secret slide in the bottom that can be removed so you
01:06:11can
01:06:11clean out all those annoying breadcrumbs. Take a look at your laptop keyboard. There are bumps on the F
01:06:18and J keys, but nowhere else. When your fingers are in the optimal typing position, your index finger
01:06:24should rest on these two keys. The bumps have been added so that you can correctly position your hands
01:06:29for typing without looking at your keyboard. If you happen to be missing your index fingers,
01:06:34perhaps from feeding sharks a little too closely, then you're out of luck.
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