- 2 days ago
Discover the surprising ways toilet paper can be used beyond basic hygiene. This video reveals the secret mechanics behind this everyday item, showcasing its potential as a high-performance tool for various tasks. From cleaning delicate electronics to keeping your fridge fresh, we explore the innovative design features that transform a simple roll into an essential asset in your home and workshop. Join us as we uncover the extraordinary uses of common objects that you’ve always taken for granted.
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FunTranscript
00:00Black stripes on yellow school buses aren't an element of design.
00:04They're actually metal rails put along the sides and the back of the bus to protect its rather thin walls.
00:11In case of a collision, they absorb most of its force.
00:14It means that the crash doesn't affect large areas.
00:17These rub rails are also positioned in strategically important spots.
00:22The lowest one runs at the floor level.
00:24The middle one matches the bottom of the seats, and the top one corresponds either to the top of the
00:29seats or the bottom of the window.
00:32Your ceiling fan can move in more than one direction for a reason.
00:36One is for summer, the other for winter.
00:39When the weather is hot, ceiling fans should move counterclockwise.
00:43This makes them pull the warm air up and push the cold air down.
00:48And the clockwise, winter mode, moves the warm air down and raises the cool air.
00:55As soon as you notice the blue bristles on your toothbrush start fading, it's a sure sign it's time to
01:00replace it.
01:02You can adjust your stapler so that it staples documents together only temporarily.
01:07It's done by rotating the crimp area.
01:10Most staplers have two options for stapling.
01:13One is standard, but the other side bends staples away from the center.
01:17Later, when you don't need them anymore, you can easily remove them by hand.
01:23Lots of people use a knife to remove strawberry stems.
01:27But this way, they throw away a lot of stuff they could otherwise eat.
01:31Instead of a knife, use a regular drinking straw.
01:34Insert one end of the straw into the bottom of the strawberry and push it gently all the way through.
01:40If everything goes as planned, the straw will pop the stem out.
01:44A tiny hole in a padlock bottom helps to drain the water from an outside lock after the rain.
01:50It prevents the thing from rusting and clogging.
01:53You can also use this hole to oil the lock's hinges so that it doesn't get stuck.
01:58If a lock doesn't have this small hole, you should only use it inside.
02:04It's a bad idea to place dirty dishes covered in mashed potatoes or any other leftover carbs closer to the
02:11sides of the bottom shelf of your dishwasher.
02:14Several studies have shown that such plates get washed better when you put them in the middle of the rack.
02:20So now you know.
02:22Weird markings on the bottom of a toothpaste tube have nothing to do with the ingredients.
02:27They're actually there for the factory robots.
02:29Not so they can brush their own teeth, either.
02:32Such a colorful square marks the line where the tube has to be cut and folded.
02:38Now, most cotton pads have two different textures on each of their sides.
02:42One surface is firmer and more absorbent.
02:45It's supposed to be used with nail polish remover.
02:48The other side is way finer and softer.
02:51You should use it to remove facial and eye makeup.
02:55Don't peel post-it notes off from the bottom.
02:58It'll create a crease in the paper, and the note won't stick well after that.
03:02Tear it off from the side, and it'll stick longer.
03:07When driving when it's already dark, you might get blinded by the headlights of the car moving behind yours.
03:13If you have a manual rear-view mirror, find a tab at the bottom and flip it.
03:18The mirror has a reflective material behind its glass.
03:21By flipping the tab, you change the angle of this material, dimming the lights in the mirror.
03:27The whole process is even simpler if you have a power mirror.
03:30All you need to do is switch on the nighttime mode.
03:35Bath foam relieves stress, cleanses the skin, and keeps the water warm.
03:40Foam is made up of tiny air bottles.
03:43They form an insulating layer on the water surface, keeping the heat from escaping.
03:49Let's say you're reading a paper book.
03:52Then you decide to take a break and realize you don't have a bookmark.
03:56Should you leave a dog ear?
03:58You don't need to.
03:59That's what the dust jacket is for.
04:02Apparently, providing you with the information about the book and its author isn't its only purpose.
04:08Your stomach growls, and suddenly, a peanut butter sandwich sounds like a great idea.
04:14You open a jar and see quite a lot of oil sitting on the top.
04:19Duh!
04:20Time to train your arm muscles and stir, stir, stir!
04:23But if you store peanut butter jars upside down, the oil will move to the bottom, and all the solids
04:30will be on top.
04:32The main purpose of the drawer under your oven isn't to store all those pots and pans.
04:38You're supposed to use this place to keep your food warm while something else is being prepared in the oven.
04:45If you don't have anywhere to put a toothpick after using it, snap off the flat end at the first
04:51groove and put it on the table.
04:53Now, you can balance the used part of your toothpick on the groove part, so it doesn't have to touch
04:59the table.
05:00The correct way to break off a piece of Toblerone chocolate bar is by pushing the pointy side downward.
05:07Me? I just bite it off, but then I'm hardly ever accused of being correct.
05:13Most extension cords are known to come undone at even the slightest pull.
05:18Loosely tie them together, and they'll stay connected even if you accidentally pull on them.
05:24The knot might get tighter, but nothing will get switched off.
05:28A little groove on the bottom of a cup lets cool air get underneath it.
05:33It saves glassware from cracking when a scorching beverage heats it up.
05:37And when you place cups upside down in the dishwasher, the groove prevents water from gathering in the cup's bottoms.
05:46Nonstick pans have a special coating, which makes them so great.
05:50But if you use metal utensils while dealing with such a pan, you're likely to scratch this coating.
05:56And once you do it, your pan is ruined.
05:59Food will stick to its surface and end up burned or unevenly cooked.
06:06Make your life brighter and get a bright side tee.
06:09Pick your own print, just follow the link below.
06:11If you've always peeled bananas, starting from the stem, try doing it the other way around.
06:17Pinch the bottom of the banana and pull.
06:20This way, you don't have to deal with strings and mess.
06:23By the way, that's the approach monkeys use.
06:26And you don't want to argue with monkeys.
06:30Most caps on small tubes are hollow on top and have a little spike inside.
06:35Its purpose is to break the foil sticker sealing the tube.
06:39The neck of the tube fits right in this hole, and the spike is designed to break the seal.
06:44No need to struggle trying to tear the tiny foil seal off with your fingers.
06:49The more detergent you use, the cleaner your clothes are, right?
06:53Not exactly.
06:55If you add too much detergent, you can spoil your things.
06:58This will produce too many suds, and your clothes won't be rubbing against one another.
07:03And that's exactly what helps them get clean.
07:06Excess suds can also keep your washing machine from rinsing properly.
07:11Book pages are often printed on large sheets of paper, rather than on small individual ones.
07:17If there isn't enough content to fill these sheets, there are blank pages left.
07:22Publishers often print the words notes or leave some other signs on them.
07:26This way, readers don't think it's a printing mistake.
07:30The rumble strips on the side of the road are supposed to wake up sleepy drivers
07:35who start to doze off behind the wheel.
07:37When your tires drift off onto these strips, the noise and vibration work like an alarm clock.
07:44It's a popular misconception that pumping a mascara wand back and forth allows more product to stay on it.
07:52In reality, doing this will only spoil your mascara.
07:56By moving the wand, you push air inside the tube.
07:59This not only produces flakes and clumps, but also makes the mascara dry out.
08:05A dime-sized hole in the elevator doors is a keyhole.
08:09If the doors get stuck, an operator can open them manually by inserting a special key in this hole.
08:16The same tool is used when an elevator needs routine maintenance.
08:21The bubbles in your soda push the straw up when they balance the buoyancy with the mass of the straw.
08:26But you can keep your straw from rising in your soda can by putting it through the hole in the
08:32metal pull ring.
08:33Ah, the science behind soda cans!
08:37Those squares of fabric that come with clothes are for you to try out your cleaning products on them first.
08:42This way, you won't ruin the entire item once you decide to wash it.
08:47The soft, round part under a soda bottle cap keeps the bubbles from escaping.
08:52Without it, your pop would go flat in no time, probably even before you buy it.
08:58And what's worse, if you bought the flat drink for your dad, then your pop's pop won't pop.
09:05The utility knife is supposed to last way longer than most people think.
09:09The knife blade is made of narrow, parallel sections.
09:12When the instrument gets blunt, break off the top section with the cap you can find at the bottom.
09:19Voila! You have a brand new sharp blade again.
09:22But don't forget to put on a pair of safety gloves and goggles before doing this.
09:27Yes, it's another sharp tip from Brightside.
09:32If you ever find yourself stuck in the trunk of your car, stay calm.
09:36All cars are supposed to be equipped with an emergency latch to help open the trunk from the inside in
09:42the unlikely case it happens.
09:44These latches are so well thought out that they can be opened by people of all ages.
09:49More so, handles are designed to glow in the dark, too.
09:53You can even pull them with a mouth if there's not enough wiggle room to use your hands.
09:57Never mind how you ended up in the trunk in the first place.
10:00Moving on!
10:01If you're ever working with needle and thread, remember you don't need to stick the needle directly into the spool.
10:08You may end up losing the needle altogether.
10:10Not to mention you can easily hurt your fingers!
10:13A lot of modern sewing kits these days come with a designated place for safeguarding the needles.
10:19It's located at the bottom part of the thread spool.
10:22You'll just need to pull it out.
10:24It's even made to hold multiple sewing needles at a time.
10:28Disposable ballpoint pens come with a little secret of their own.
10:32Did you ever notice that in some of them, there's a small hole in the plastic part?
10:37It's actually a rudimentary ventilation system.
10:40It's supposed to let the ink easily make it to the tip of the pen.
10:44Okay, I know it's in the name, but you really don't need to shake the seasoning shaker to get any
10:50product out.
10:51Don't believe me?
10:52Hey, you're not the only one.
10:53Go grab your favorite seasoning bottle out of your pantry.
10:57If it has one of those removable plastic caps, it's perfect for the experiment.
11:02Instead of shaking the bottle, try holding it from the plastic cap while it's upside down.
11:08Now gently twist the bottle from side to side and, before you know it,
11:12you get some gorgeously flowing seasoning without having to wiggle the shaker and make a mess all over the stove.
11:19On the same note, most salt and pepper shakers should have ridges on the bottom of the glass portion.
11:26In case you get any seasoning stuck in there, place the bottom of the salt shaker against the bottom of
11:31the pepper shaker
11:32and wiggle it around so the ridges click with each other.
11:35The seasoning should easily pour out now without you having to open the bottle.
11:40In colder weather, you often have so many clothing layers on you that you can hardly feel the purse or
11:46back straps on your shoulder anymore.
11:49Not to mention how fast they can slide off.
11:51Some jackets come with a built-in solution for that, in the form of a small tab on the shoulder
11:57with either a hook or a button.
11:59It's meant to be opened and closed comfortably, so you can keep your purse in place at any time.
12:06You're most likely using it merely to peel the skin of potatoes, carrots, or cucumbers.
12:11But you can use your vegetable peeler for chopping fine strips of onion as well.
12:16Just cut the onion into quarters vertically and then start slicing.
12:21This might also help out with those embarrassing onion tears.
12:25Most people miss this one, but should you ever have a closer look at your toothpaste tube,
12:30you will surely see some sort of coloring there, either a dot or a block.
12:35Colors can vary.
12:37They can be black, green, red, or even blue.
12:40These color spots are actually meant to help the assembly machines back at the toothpaste factory.
12:45They recognize when and where these machines need to cut the toothpaste tubes and proceed to fold them for packaging.
12:52For most types of footwear, if there's anything that seems a bit out of place, always know that it's there
12:58for a reason.
12:59Most manufacturers don't put extra items on shoes just for fun.
13:03It would definitely be a waste of time and resources.
13:06For footwear, like boots, for example, there's often a small loop at the top back of the shoe.
13:12It's there to help you when you need to put the shoe on, since you can quickly pull on it.
13:16Plus, you can also hang the shoes somewhere, most likely to dry, since most boots are meant to be worn
13:23in the colder weather.
13:24Now, I've been guilty at least once of overdressing with a bunch of layers, just so I won't need to
13:30jam everything in my check-in bag.
13:32But does it become a problem when you actually have to get seated?
13:36What do you do with your coat or your jacket?
13:38Well, have a closer look next time you board a plane on the seat in front of you.
13:44The hook that keeps the tray table upright can double as a jacket hook.
13:48As long as you don't need to have any meals while in the air, you're good to go.
13:53Now, most mascaras expire within 3-6 months, I'm told, depending on the manufacturer.
13:59But you can help speed up that process if you're not careful enough.
14:04Continuously pumping the mascara wand, trying to mix in the product, actually pushes more air into the tube.
14:10This can make it dry much faster, and you evidently won't get the desired results with it anymore.
14:16There's an easy way to check if your mascara is still good enough to use.
14:20If you don't hear a popping noise when you take the brush out,
14:24you may very well need to go get yourself a new mascara tube.
14:28Now, I know we're living in the era of Bluetooth-connected devices.
14:33But for better quality sound, they still recommend using headphones that connect via audio jacks.
14:39Remember seeing black ridges on those jacks?
14:42They aren't there just to make them fit when you plug them into your phone or laptop.
14:46Made out of a special insulating material,
14:49these bands are meant to guard the wires when sound is being transmitted.
14:54Based on the number of bands, you can figure out which end goes where.
14:57Some empty space under noodles in a cup doesn't mean the company producing them wants to cheat you out of
15:04a full portion.
15:05No, no.
15:05It's a manner of keeping the noodles intact during their transportation.
15:09It also helps with the circulation of hot water that is poured over the products before you can enjoy them.
15:15The V-shaped neckline was initially designed to serve a bunch of objectives.
15:20First, as a way of prolonging the life of the garment that would maintain its shape over the years.
15:26It's also there to fit your head through the shirt in case it needs some stretching.
15:30This way, it ensures a snugger grip around the neck.
15:33Lastly, it helps absorb sweat in case you're wearing the shirt while exercising.
15:39Now, it's not necessarily a custom anymore,
15:41but you may have stumbled upon a dinner jacket with an additional mysterious pocket on the right side.
15:48Turns out, this pocket was used by men to easily reach their train tickets,
15:53since most of them had to travel to work every day.
15:55It helped them keep their jacket buttoned up, but also benefited from the use of a pocket.
16:01Now, it's only added as a decoration, and it doesn't serve an actual purpose anymore.
16:06Speaking of things we don't use these days, or at least for their initial purpose,
16:11did you know Play-Doh was originally a cleaning product?
16:15In the 1920s, the market was in need of a product
16:18that could help them wipe the wallpapered areas around coal-burning furnaces.
16:23The recipe for what we now know as Play-Doh was thus invented.
16:27It was manufactured in white only,
16:30and was supposed to clean wallpaper by being rolled back and forth over the dirt.
16:34It was only later, in the 1940s, that new products for cleaning wallpaper were brought up,
16:40and Play-Doh was redirected toward another area of the market.
16:44Now, while I enjoy a nice piece of toast for breakfast,
16:48isn't it pesky to have to clean out the toaster?
16:51Well, not anymore, since I recently found out that toasters have a slide or a panel at the bottom
16:58that helps get rid of all those annoying breadcrumbs easily.
17:04Now, there used to be a time when you could only have access to video games
17:08by inserting cartridges in your console of choice.
17:11These tiny objects gave many doctors a lot of headaches.
17:15People soon started popping up in hospitals after swallowing small game cartridges,
17:21especially the younger generation.
17:23Nintendo, the company that manufactures the majority of these devices,
17:27had to come up with a creative solution to prevent these accidents.
17:31So, these days, Nintendo Switch cartridges are purposely coated with specific chemicals
17:36that can leave a really bad bitter taste in the mouth.
17:40Not that I'd, you know, recommend you ever try and taste for yourself.
17:44Hmm.
17:45Have you ever wondered what these extra holes at the top of your running shoes are for?
17:50They're designed so that you can tie the shoes in multiple different ways.
17:54That's useful when you want to compensate for things such as a bad stride or even a damaged toe.
18:01Plus, you can change the look of your shoes the way you prefer.
18:06Many people use a dust jacket of their book as a bookmarker.
18:10No problem with that.
18:12It will save your book from bent page corners.
18:14But the primary purpose of a dust cover is to keep the book safe from distortions.
18:19For instance, if you spill juice or drop some of the food on your book while reading it.
18:25The Tic Tac dispenser has this little groove on its top,
18:29so you can dispense only one Tic Tac at a time.
18:32Even though, let's be honest here, nobody does that.
18:35Most of us just spill a whole bunch at once,
18:37and then we wiggle all those extra Tic Tacs back in.
18:42Those rubber bumps you see between the tire treads are there for your safety.
18:47The raised edges tell you what the minimum height of your tread is.
18:50If the bump and the edges are even,
18:53it's time for you to visit the tire shop as soon as possible.
18:57But if the bumps are well beneath the level of the edges, you're good to go.
19:02What about that black grating on the microwave window?
19:06It's something called a Faraday shield.
19:08And it's there to prevent microwaves from getting away and turning the entire room into a Faraday cage.
19:14If the microwaves escape, your meal won't cook properly either.
19:18So, yep, the cage is not there to make it difficult for you to see your meal while it's cooking.
19:23It's keeping the electromagnetic energy inside.
19:28How about a wrench compatible screwdriver?
19:31Cover your screwdriver with the end of your wrench and you can increase its torque.
19:35That's why the head of your screwdriver is designed the way it is.
19:38When you have odd angles, you can use this strategy.
19:43You've probably heard those myths, the blue side of the eraser can erase the pen.
19:48False.
19:49Its purpose is to erase a pencil.
19:51But in case you're writing something on heavier paper.
19:54The blue side can remove smudges you see after using the pink eraser too.
20:00Have you ever wondered why oranges in supermarkets mostly come in the red mesh bag?
20:06It's a trick to make this food look more orange and encourage you to make a purchase.
20:11An extra tip.
20:12Don't throw away the mesh bag.
20:14Tie it up so you can have a small pot scrubber to clean your sink, kitchen, appliances and dishes.
20:22You can see golf balls don't have a perfectly round shape.
20:25Their surface is covered with many little dimples, something golf balls didn't always have.
20:31At one point, experienced golfers started noticing how through time,
20:35older balls with imperfections, such as nicks and bumps, could travel further.
20:41Such things create turbulence in the air around the golf ball, which eventually reduces drag.
20:47So, manufacturers started producing balls with dimples so they could go farther and faster.
20:55You might have noticed that sometimes there are ridges in toothpick tops.
20:59It's more hygienic because when you break that off, you can prop the toothpick up on it and it won't
21:04touch anything.
21:08Another safety feature you'll find, this time in your car, is a tab on your rearview mirror.
21:14With it, you can change the position of the mirror so you don't get blinded if there's a car behind
21:18you with its high beams on.
21:21So, this little tab helps you control the glare of lights coming from behind.
21:25This feature showed up in the 1930s, but in the early 1970s, it became a part of standard equipment in
21:32most trucks and cars.
21:35Do you see that tiny hole on your iPhone, right next to the rear-facing camera?
21:39It's a microphone, and it's there so your phone can record sound as you turn your camera around.
21:47Some cables have a thick cylinder towards the end of the cord.
21:51It's called a ferrite core, or a choke.
21:54It's a magnetic iron oxide that stops high-frequency electromagnetic interference.
22:00For example, you know that annoying static noise you get if you bring your phone too close to a speaker?
22:06This interrupts your call, which is why cable cords with big cylinders are pretty useful, because they prevent these things.
22:15Do you know why nearly all luggage bags and backpacks have two zippers?
22:19It's way more convenient and easier to open in that way.
22:22But not just that, you can also lock these two zippers together to keep the stuff inside your bags safer.
22:30You know how toilets at public spots like malls have those big gaps at the bottom?
22:36It's primarily for better circulation of air.
22:39This type of door also makes it easier to clean the toilet or check if it's occupied if you're standing
22:44in line.
22:46Other than that, if you get stuck there and the lock gets broken, you still have a way to escape.
22:52You can just crawl out.
22:55Ever notice those plastic end caps on utility knives?
22:59And they also have scales on them, which indicates you may use them multiple times, but with sharp edges.
23:06You can separate the blades through these plastic end caps.
23:09Then, you can move the slider and bring the sharp blade to the front.
23:14If you've ever taken a moment to examine a regular grocery cart, especially their fold-out section, you probably noticed
23:21those metal loops jutting out.
23:24They're designed to protect the items you carry in your cart.
23:28You can use them to hang bags with soft items.
23:31You don't want to accidentally squish with heavier products, like bread, or easily breakable things, like eggs.
23:40Many coffee mugs come with curved notches on their bottom.
23:43When you're washing your mugs, put them against the rack at an angle in your dishwasher.
23:48This way, the water won't pool in there, so your favorite cup will be completely dry by the time you
23:53take it out of the dishwasher.
23:55If you're a McFlurry fan, you've probably noticed there's a square hole in the handle of the spoon.
24:02It's there so you can attach it to the special machine that mixes the ice cream and your favorite toppings
24:07together.
24:08The machine has a bar that slips into this square-shaped spoon and then thoroughly stirs it.
24:14And you get the spoon so they can minimize the mess during the process.
24:18Quite neat, wouldn't you say?
24:21A regular milk jug has a dent on one side.
24:25Some might see it as a random design decision, but a dent has several purposes.
24:31One of them is to get bigger if there's a gas buildup.
24:34This happens when your milk is spoiled.
24:37So you don't even have to try to check this out.
24:39Also, the dent is there so the jug doesn't burst if you accidentally drop it.
24:44The dent allows the expansion space that deals with the sudden pressure that happens when you drop the jug.
24:52Dental floss.
24:53Sure, it's important for your dental health and it's easy to assume what you do with it.
24:57But dental floss is great in the kitchen as well because it's a very precise cake slicer.
25:04Way better than a regular knife.
25:08Most kitchen shears have a serrated opening right there at the center where the blades and handles meet.
25:14It's something you can use to trim difficult herbs such as rosemary, thyme, or chives.
25:20Because of this opening, you don't need to pick the leaves off by hand.
25:23But de-stem them in one motion.
25:27The majority of gelatin containers or single-serving yogurts come with a tinfoil lid.
25:33And in most cases, you can use this covering as a disposable spoon.
25:38Just peel away the covering and after a couple of simple folds, you'll have a perfect little spoon for your
25:43midday snack.
25:46You're trying on a pair of jeans, a dress, or a jacket, and are about to dig your hand into
25:51the pocket when you realize there's no depth to it.
25:55The pocket is simply not there.
25:57But why would anyone create pockets you can't put anything in?
26:01And now would be a good time to pick your iPhone up from off the floor.
26:05Well, the reason for fake pockets is simple.
26:08If a clothing item has a specific cut or shape, pockets may spoil it.
26:13They can alter the item's shape, either in the warehouse or already on the retail rack.
26:18The solution? Getting rid of pockets in key areas.
26:22Plus, fake pockets are obviously cheaper, and they don't get stretched out.
26:27Interestingly, this practice goes back to the 17th century.
26:31That's when pockets were actually removable.
26:33They resembled small bags, and women, for example, could move them from one outfit to another.
26:39Unfortunately, it was also very convenient for pickpockets.
26:43They could grab such a pocket and run off with it.
26:46Then clothes became more streamlined, and slim pockets started to be sewn right into them instead of attachable bags.
26:54This was believed to make the shape of a person's silhouette more alluring.
26:58But soon, slimmer skirts came into fashion, and pockets went out of it.
27:03And people started using handbags instead.
27:06These days, most pockets are real.
27:09But some of them are still fake.
27:11So, how can we make sure that we don't actually turn a fake pocket into a hole, thinking it's a
27:17real one?
27:17Well, first of all, take a look at the stitching along the edge of the pocket, where it's supposed to
27:22open up.
27:23If you see a single loose thread, just snip a piece of it and start pulling gently.
27:28If the pocket is real, the thread will easily come out.
27:32But if you feel that the stitching won't budge, most likely, you have a faux pocket on your hands.
27:38If this is the case, just leave it be.
27:42Now, let's move on to some other everyday objects that may be hiding some secrets.
27:47For example, those lines on some kinds of chips.
27:50For one thing, they help with the distribution of spices and seasonings.
27:54In other words, all those substances that make your chips taste like cheese are mostly stored inside the lines.
28:01Plus, the lines make chips crunchier.
28:05Highlighters are filled with a special semi-transparent fluorescent ink that can glow in dim light.
28:11Yellow and light-green hues are the most popular because they don't prevent you from seeing the text after black
28:17-and-white photocopying.
28:19Photocopiers perceive yellow and light-green marks as almost non-existent and don't print them.
28:25Now, back in the day, the first jeans had one problem.
28:29Workers and miners, who were the original jeans wearers, put too much pressure on the poor piece of clothing.
28:35As a result, the seams couldn't withstand the stress and tore.
28:39So, tiny metal studs were invented to prevent this from happening.
28:44Most metallic zippers have a hidden lock inside them.
28:47That's why you shouldn't leave the zipper handle in an upward position.
28:51When you pull it downwards, it automatically locks.
28:54It's all thanks to several tiny grooves hidden underneath the handle.
28:59Now, about those horizontal lines on plastic bottles.
29:02They help hold bottles up.
29:04Some bottles are produced from soft plastic.
29:07Without the lines, they wouldn't keep their shape.
29:10Instead, they would twist easily or even break.
29:13Bath foam isn't only for fun or a nice smell.
29:16It helps regulate the temperature, too.
29:18The bubbles keep the water hot.
29:21And you can enjoy your bath a bit longer.
29:23With or without your rubber ducky.
29:26Ever notice that layer of clear liquid in gel pens?
29:30It's called the ink follower or stopper fluid.
29:33The gel in such pens contains pigment particles dissolved in a polymer solution.
29:38The gel should be thick enough to keep the pigment particles suspended,
29:42but also thin enough to flow first onto the ball and then the paper.
29:47The main task of the stopper fluid is to be a barrier to prevent the gel from evaporating or leaking
29:53out.
29:53Without this transparent fluid, your gel pen wouldn't function.
29:57The fluid always stays in one position and doesn't get dissolved with the gel.
30:02Neither does it move backward or flow out of the pen.
30:06The holes in the bottoms of your earphones allow air to circulate up and through the speakers.
30:11It allows to increase low frequencies, making the bass sound deeper.
30:16The quality of the sound also becomes much better.
30:19Some plastic milk containers have dents on their sides.
30:22Try as they might, they just cannot park without some damage.
30:27Nah, I made that up.
30:28These dents serve several purposes.
30:30For one thing, when milk spoils, this process usually causes swelling and high-pressure buildup inside the container.
30:38Oh boy.
30:38That's when the dent comes in handy.
30:40It pops out and doesn't let the jug blow up.
30:43Plus, if you ever decide to freeze the milk, it will expand like any other liquid.
30:48And then again, the indentation will pop out and prevent the container from breaking inside your freezer.
30:55That's a good thing.
30:57Airplane windows have rounded edges, and that's a crucial safety measure.
31:01It prevents aircraft accidents.
31:03Weak spots are usually situated in the corners.
31:06If airplane windows were square or rectangular, each of them would have four potential weak spots.
31:12Under pressure, they would collapse.
31:15If you look closely at a tram's overhead lines, you'll see that its contact wires zigzag back and forth instead
31:22of going in a straight line.
31:24The thing is that all trams have pantographs attached to their roofs.
31:28The upper part of the pantograph is gradually worn down by the overhead wire and eventually needs to be replaced.
31:35To wear it down evenly, the wire is not installed strictly along the tram's path, but in zigzag patterns.
31:42As the tram moves, the pantograph slides along the wire and it wears down evenly.
31:48You might have wondered why some gas cans have two holes with caps, one bigger and one smaller.
31:54Before, I thought that the little hole was used when you poured something into a smaller container.
32:00But I was wrong.
32:01A very infrequent occasion.
32:03In reality, you're supposed to uncap it before you pour the gas inside the bigger hole to prevent it from
32:09glugging and spilling on your clothes and on the ground.
32:13Most of the buttonholes on a shirt are vertical, but the top and sometimes bottom ones are horizontal.
32:20The reason is simple.
32:21These two buttons slip out more often than others.
32:25Luckily, producers have found the solution that can prevent these buttons from slipping out.
32:30Horizontal buttonholes.
32:31What engineering!
32:32Buttons tend to slip out less from such buttonholes.
32:36Sticks sachets of sugar or salt are easier to open than many people think.
32:41There's no need to tear off one of the ends.
32:43The right way is actually to tear them down the middle.
32:47Some boots have loops sticking out on the back.
32:50Their main purpose is to help you pull your shoes on easier.
32:53Just tug on the loop while you're pushing your heel into the boot.
32:57You can also use these loops to hang your boots on a hook when they're dirty or when you want
33:02to dry them after washing.
33:03Or you can run your laces through the loop if you want to tie them around your ankle.
33:08When you're on board the plane, you might spot a little triangle over your seat.
33:13Such triangles show the flight crew the best spots to check the plane's flaps through the window, just in case
33:19they're flapping.
33:20If your shoes are really slippery, just take a bit of sandpaper and rub it on the soles for better
33:26traction.
33:27They'll become more grippy, and you'll be able to wear them out in the rain.
33:31Now, if they get too wet, they might turn griping.
33:34But that's only if you have talking shoes.
33:37If you drill several holes at the bottom of your garbage can, putting in and taking out trash bags will
33:43become much easier.
33:45You won't have any problems with suction.
33:48You can usually find some silica gel in bags, shoes, and many other things you buy.
33:53This shell absorbs excess moisture.
33:56Don't throw it away.
33:57Each time your shoes get wet, put a few packets of silica gel inside.
34:02The thermos wasn't actually invented to keep your coffee warm.
34:06It was made by a Scottish scientist who just wanted a safe place to put his chemicals at a stable
34:12temperature.
34:12So, he took two bottles, put the smaller one inside the bigger one, and vacuumed out the air between them.
34:19Well, anyway, thanks for the hot coffee!
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