- 7 hours ago
Think twice before tossing out that 'empty' item! Many household objects hide remarkable engineering tricks that can transform them into valuable tools. In this eye-opening exploration, we reveal the surprising strengths and functions of everyday items often deemed useless. From clever kitchen tools to resilient scrap materials, these insights will forever change how you view disposables. Discover the top method to turn what you thought was trash into a high-performance asset worth a fortune!
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00:00Now, if you're as watchful as I am, you've probably noticed those zigzag patterns on the edges of some packages,
00:06like bags of chips or chocolate bars.
00:09It's clear that they're there to make it easier for you to tear the plastic.
00:12But why does it tear so easily?
00:15Now, plastic is made of long molecules called polymers.
00:19You can compare it with a fabric made of long threads.
00:22But the scale is much smaller, and these strands aren't actually woven together.
00:27What ridges do is remove the support of the surrounding polymer fibers.
00:32When the edge is flat, the molecules are surrounded and kind of protected by their mates.
00:37But if the edge is uneven, molecules on the peaks of the ridges are much more exposed to mechanical damage.
00:44Plus, such an uneven edge allows you to apply more force to a specific point, the groove.
00:50And once that point fails, the groove moves to the next point, causing more tearing.
00:55And this process continues until you stop applying the force, or until you're done tearing the packaging apart.
01:02But this isn't the only packaging secret.
01:05I'm about to reveal the most unexpected packaging facts.
01:09Now, is this what the future of packaging looks like?
01:12A Swiss company has invented a magic juice box.
01:15It's made of agar-agar seaweed gel and water.
01:19It can only contain short-term smoothies and juices.
01:22The box also withers at the same rate you consume the product inside.
01:27Wow! Doesn't it sound like the future is here?
01:30That overwhelming smell of coffee that literally hits you once you open a jar with instant coffee?
01:36This scent is actually just a coffee aroma sprayed onto the lid.
01:40It's done to provide you with the enticing smell of freshly ground coffee.
01:45One of Korea's leading manufacturers of instant noodles has come up with innovative packaging for their production.
01:52It can be safely used in microwaves.
01:54The company claims that some additional material used in this packaging can remain intact without melting, even at high temperatures.
02:02Well, it'll definitely make the process of heating up your lunch much faster.
02:07Now, almost all food we consume has an expiration date.
02:12But this rule doesn't apply to water.
02:14Hmm.
02:15But how come there's an expiration date on every water bottle?
02:19There's no paradox here.
02:20This expiration date refers to the bottle, not the water inside.
02:25They say that regardless of the brand, all chips have a best before date that ends on a Saturday.
02:32It's because a production week starts on a Sunday and correspondingly ends on a Saturday.
02:38Well, I've checked my stash and it seems to be true.
02:41Go look at yours and write in the comments what you found out.
02:46Bubble wrap was originally designed to serve as textured wallpaper.
02:49It was invented in 1957 by engineers Mark Chavons and Alfred Fielding in New Jersey.
02:56They sealed together two shower curtains trapping inside a smattering of air bubbles and wanted to sell the resulting product
03:04as an innovative kind of wallpaper.
03:06Unfortunately, the product turned out to be a failure as wallpaper.
03:10Then the inventor started selling it as greenhouse insulation.
03:14But it wasn't until 1961 that the material's protective qualities were discovered.
03:20And the first client that used bubble wrap as a packaging material was IBM.
03:25This company used it to protect its big IBM 1401 mainframe computer during shipment.
03:32Now, people love personalized products.
03:35According to researchers, a whopping 52% of online customers are more willing to repeat their purchases from a company
03:42when they get personalized shipping boxes.
03:45If you've ever seen someone unboxing Apple products,
03:48you probably noticed that the company used very laconic packaging.
03:53This probably made you think that they put no effort into it.
03:56But that's not true.
03:57To achieve such a level of perfect simplicity,
04:01Apple has created a real culture around its packaging.
04:04The company's headquarters even have a special place
04:07where they come up with packaging designs for new products.
04:10The egg carton was designed in 1911 by newspaper editor Joseph Coyle from British Columbia.
04:17The main goal of this invention was to resolve a dispute between a local farmer and a hotel owner
04:23who kept complaining that the farmer's eggs were delivered broken.
04:27So, necessity is the mother of invention.
04:31Nike has created a shoebox made completely out of recycled trash materials,
04:37mainly drink containers.
04:38This box also allows its owner to wear it as a backpack.
04:43Now, paper packaging for food goes all the way back to China,
04:47to the 2nd century BCE.
04:49At that time, food was often wrapped in thin sheets of mulberry bark.
04:54And later, the idea spread all over the world.
04:57And in 1879, one accident literally changed history.
05:01A worker from a paper bag factory in Brooklyn set the machine he used to the wrong settings.
05:08And instead of creasing small bags, it cut through them.
05:12When the owner of the factory readjusted the settings on the machine,
05:16he realized that it could cut and crease at the same time.
05:19This led to the appearance of mass-produced paperboard boxes.
05:24Now, researchers have found out that the process used during the manufacturing of cardboard boxes can ward off germs.
05:31Hear me out.
05:31To make cardboard, they shape layers of paper and bond them at a temperature of up to 200 degrees Fahrenheit.
05:38That's hotter than most harmful bacteria can withstand.
05:42That's why cardboard boxes are a rather safe way to package foods.
05:46After all, they come out of the manufacturing process sanitized,
05:50even when they're made of recycled materials.
05:53That little open jar icon on cosmetic packaging is the PAO, period after opening symbol.
06:01It informs consumers about the period of time a product may be used after the package is unsealed.
06:07The symbol, featuring a number followed by the letter M for months,
06:11can be seen on almost all cosmetic products.
06:14Some plastic milk containers have dents on their sides.
06:18These dents serve several purposes.
06:20For one thing, when the milk spoils, this process usually causes swelling and high-pressure buildup inside the container.
06:28That's when the dent comes in handy.
06:30It pops out and doesn't let the jug blow up.
06:33Plus, if you decide to freeze the milk, it will expand like any other liquid.
06:38And then again, the indentation will pop out and prevent the container from breaking inside your freezer.
06:45Soda bottles are always filled in such a way that there's some space between the liquid and the cap.
06:51That's because soda contains carbon dioxide.
06:54It's a gas that can expand once the bottle is heated.
06:57If there's no gap in the bottle, it can break because of the pressure building inside.
07:03Also, when you open your drink, the gases go out in the form of bubbles,
07:07and the drink is likely to overflow.
07:09The gap helps with this problem, too.
07:12Now, about those horizontal lines on plastic bottles.
07:16They help hold bottles up.
07:18Some bottles are produced from soft plastic.
07:21Without the lines, they wouldn't keep their shape.
07:23Instead, they would twist easily or even break.
07:27Number 57 on a Heinz ketchup bottle has nothing to do with the product label.
07:32The truth is that the place with the numbers is the very sweet spot you should tap to get the
07:38ketchup flowing.
07:39So, stop smacking the bottom of your sauce bottle and tap the 57.
07:44By the way, if you've been wondering why the number is exactly 57, not 34 or 89,
07:51this comes from the historical advertising slogan, 57 Variety,
07:55created by the Heinz Company located in Pittsburgh, USA.
07:59This advertising campaign told customers about the numerous products manufactured by the company.
08:06Now, at first sight, everything is obvious about plastic lids on disposable cups.
08:10To keep your beverage inside, right?
08:13But that's not all they're capable of.
08:15As soon as you find a cozy spot and get ready to sip on your drink,
08:20you can use the lid as a coaster.
08:22If you look carefully, you'll notice special ridges that hug the bottom of your cup snugly.
08:27It's a snugly hug.
08:29The size of each lid fits the bottom of the corresponding cup.
08:36And the soft round part under a soda bottle cap keeps the carbonation from escaping.
08:42Without it, your pop would go flat in no time, probably even before you buy it.
08:50Road and construction workers are usually dressed in orange because the bright orange hue is visible even in bad weather.
08:58It's the most effective color to attract attention and alert people.
09:01No wonder lots of safety jackets and traffic cones are orange as well.
09:05The stop sign has an eight-sided shape to help drivers recognize it easily, even if they see it from
09:11the back.
09:11And when the signs weren't reflective yet, the octagon shape prevented drivers from confusing the stop sign with any other
09:18at night.
09:19The rumble strips on the side of the road are placed there to alert drivers who doze off behind the
09:24wheel.
09:25When their tires move over these strips, the noise and vibration work like an alarm clock.
09:30There are magnetic locks on fuel hoses at gas stations.
09:34They come in handy if someone drives away with the gas nozzle still attached to their car.
09:39In this case, the lock detaches the hose automatically.
09:42Oh, that's embarrassing.
09:44Gasoline looks like a rainbow in a puddle because it can't mix with water.
09:48It forms a thin membrane over it.
09:50When light reflects from it and the water at the same time, you've got a rainbow.
09:56A triple handle on a jerry can is there to make it easier for two people to carry it and
10:01distribute fuel evenly.
10:03Gas cans often have a second hole that actually needs to be uncapped too before you pour the gas.
10:08The air passage will prevent it from pouring out, so no more fuel waste.
10:13Most gas cans have two holes with caps, a bigger and a smaller one.
10:18You're supposed to uncap the smaller hole before pouring gas inside the bigger one.
10:22It'll prevent the liquid from glugging and spilling all over your clothes and the ground.
10:27Another little thingy we often neglect is a point on an ointment cap.
10:32Most tubes are usually sealed with a plastic film or a foil, and opening it with your fingernails isn't the
10:37best idea.
10:38A point easily opens even the most safely sealed tube.
10:43You can use most screwdrivers together with a wrench to create more torque.
10:48Just place the wrench over the handle of the screwdriver.
10:51This way, you'll need to apply a lot less force than before.
10:55You'll also be able to get to hard-to-reach areas more easily.
10:59They install cameras in shops, banks, and hospitals to monitor everything.
11:04If something happens, you can call the police or rescuers.
11:08The camera really helps to solve a lot of problems.
11:10Why are there no cameras on planes?
11:14The crew keep order on the plane, but they won't be able to do anything if something serious happens.
11:19Besides, there's nowhere to run on the plane.
11:22During the flight, the cameras are useless.
11:24And after the flight, the words of the passengers work ideally instead of cameras.
11:29So, if cameras do no good, then why spend money on them?
11:34Water is great at cleaning stuff because it has triangular molecules.
11:38They're made of one oxygen and two hydrogen atoms.
11:41Um, H2O?
11:42Such molecules have slightly different charges on their opposite sides, pretty much like magnets.
11:48That's why water easily sticks to other molecules, including those that make up dirt.
11:53Lots of private houses have triangular-shaped roofs because this allows rain, snow, and fallen leaves to slide off the
11:59slope.
12:00If all this stuff piled up on top of your house, one day, your roof would collapse.
12:06When a storm is coming, clouds seem to turn dark, but it's just an illusion.
12:10Thin clouds on a sunny day let the light through easily.
12:14They also scatter all the colors of the light spectrum.
12:17This makes us perceive the clouds as white, but the thicker the clouds are and the more water droplets they
12:23contain,
12:23the less light they let through and the darker they look.
12:27A good doorknob is the one made of brass, bronze, or some copper alloys.
12:33These metals have an anti-germ effect.
12:36Bacteria spread way slower on them.
12:38They also get rid of germs pretty fast, within a couple of hours.
12:42Nope, it doesn't mean you don't have to wash your hands.
12:46Diamonds have such symmetrical shape to show you their brilliance.
12:49Initially, the gems aren't so beautiful.
12:52They go through several stages of cutting and then become pieces of elegance.
12:57Most of these stones have a round shape with slightly pointed corners.
13:01Diamonds shine the brightest in this shape.
13:05Why are there two holes in the socket?
13:07The left hole is neutral.
13:09The right hole is not.
13:10And the gap underneath is ground.
13:13Electricity needs to flow through the chain.
13:15The current flows from the hot slot, passes through your phone charger, for example,
13:20and then goes through the neutral hole.
13:23Ever wondered what that small pocket on your jeans is for?
13:26People used to wear watches on chains.
13:28That small pocket was meant for it.
13:31Now, almost no one wears such a watch, but the pocket remains.
13:35You can still keep something small in there, like a ring.
13:38In London, there are some poles that look like street lamps, but there are no bulbs.
13:43Well, their official name is stink pipes, and they're a thing of the past now.
13:48But they used to come in handy back in the 19th century.
13:51These hollow poles would vent away the air and explosive gases with bad smells to prevent,
13:56shall we say, unwanted consequences.
14:00Most kitchen shears have metal plier-like teeth in the middle.
14:03Between the handle grips, they can help you crack nuts, crab shells, and other tough products.
14:09You can also open jars and bottles or remove herb stems with their help.
14:14Leather often looks dull to the eye because it's covered with itsy-bitsy scratches and scrapes.
14:19They scatter the light that hits the material.
14:22When you coat your shoes in a layer of wax, you fill these tiny crevices.
14:27The surface becomes smoother, and the rays of light bounce off it more evenly.
14:31That's why the leather looks shiny.
14:34Highlighters are filled with a special semi-transparent fluorescent ink that can glow in dim light.
14:40Yellow and light green hues are the most popular
14:43because they don't prevent you from seeing the text after black and white photocopying.
14:48Photocopiers perceive yellow and light green marks as very pale and don't print them.
14:54They make magnets shaped as a horseshoe because this increases the magnetic force.
14:59Colors matter too.
15:00The blue part indicates the south pole.
15:02The red part, the north pole.
15:05The two poles work simultaneously and increase the attraction force.
15:09The dime-sized holes in elevator doors is actually a keyhole.
15:14If the doors get stuck, an operator can open them manually thanks to this hole.
15:19They'll just insert a special key.
15:21The tiny hole in the airplane window is there to balance air pressure.
15:26The window has three layers.
15:28The outer pane is extremely sturdy.
15:31It can withstand air pressure differences during takeoff and landing.
15:35The inner pane, which is the closest to you, is made of cheaper materials.
15:39It prevents potential damage to the window.
15:41The hole itself is in the middle pane.
15:44It not only balances the pressure, but also prevents the window from fogging.
15:50Escalator brushes are there for your safety.
15:52They don't allow you to come too close to the edge of the escalator.
15:55This way, your clothes won't end up between the steps.
15:59You see the sun as yellow or orange.
16:02Because the atmosphere of our planet scatters such colors as blue, green, and violet.
16:07This is also why the sun looks warmer at sunrise and sunset.
16:12Go shopping for some oranges and I'm sure you'll get them in a red mesh bag.
16:16You'll rarely see them lying around without one of those.
16:19It's pure marketing, and that color isn't a random choice.
16:22When packed in a red mesh bag, oranges appear more orange, fresher, and more appealing to you.
16:29So, you're more likely to buy them, right?
16:31Lemons are usually sold in green mesh bags for a similar reason.
16:35If you pack them in red, they'll appear more orange.
16:39Green goes better with yellow, and makes those lemons stand out.
16:43Mattress manufacturers make a limited number of different mattresses.
16:47And the only way to make them look different is to come up with a fancy stitching pattern.
16:52Two mattresses of two different companies might be the exact same quality, but cost differently.
16:57Most people will never know it, and will decide that different patterns mean something in terms of quality.
17:02So, when shopping, don't mind the pattern at all.
17:07Almost all hotels have white bedsheets.
17:09They choose this color specifically to show how high their standards of cleanliness are.
17:14The whiter and brighter the sheets are, the more luxurious the hotel seems.
17:18It's much easier to see dirt and stains on white linen.
17:21It's like proof that you've checked into a clean room.
17:25New iPhone models with large screens have a convenient option called reachability.
17:30Thanks to this function, you don't have to struggle to reach the top of the screen.
17:34This feature can be found in the phone's accessibility settings.
17:38It allows you to lower your screen down.
17:40The rumble strips on the side of the road are there to wake up sleepy drivers who doze off behind
17:45the wheel.
17:46When your tires drift off onto these strips, the noise and vibration work like an alarm clock.
17:52Most kitchen shears have metal, plier-like teeth in the middle.
17:55They allow you to use the device for multiple purposes.
17:58They're placed between the handle grips for you to crack nuts, crab shells, and whatnot.
18:03You can also open jars and bottles with their help.
18:06Some people even use these teeth to remove stems from herbs.
18:09If your audio jack has three rings, it means your device can produce stereo sound,
18:15and your earphones have the microphone function.
18:17The black grating on a microwave oven door is called a Faraday shield.
18:22It stops microwaves from getting away.
18:24If they do, your food won't cook properly.
18:27The digits on an egg can tell you a lot about the product.
18:31In many countries, there's a special labeling system.
18:34The first number indicates the method of production.
18:36The following two-letter code stands for the country where the egg was produced.
18:40And then you can find a registration number.
18:43It indicates the laying hen establishment.
18:45The first number in this code can vary from 0 to 3.
18:490 means it's an organic egg.
18:511. It's a free-range egg,
18:53which means it was produced by a hen that was allowed to wander around outdoors.
18:572. Stands for an egg produced in a deep-litter indoor housing.
19:013. You're about to buy a cage farming egg.
19:04A black band that runs along the edges of your windshield is called the Frit.
19:09It's a baked-in ceramic paint that starts as solid black bands near the edge of the windshield.
19:14Then it dissolves into smaller dots.
19:17The Frit makes the glass rougher, and the adhesive sticks to it better.
19:21The Frit protects the urethane sealant.
19:23It's the substance that fixes the glass to the frame.
19:26It also prevents the sun's ultraviolet rays from melting the adhesive.
19:29As for the black dots, they help distribute the temperature in the car more evenly.
19:35They're aesthetically pleasing, too.
19:37Without them, the contrast between the glass and the dark band would be too obvious.
19:42If you see a pair of jeans with an extra loop, those are special jeans for cyclists.
19:47They're likely to belong to the commuter clothing line, and the loop's main purpose is to hold your bike lock.
19:54Many zipper sliders have outer rings, especially if such sliders are supposed to be used together.
20:00These rings are added so that you can connect the sliders with a lock and keep pickpockets away.
20:06Keyboards come with little legs.
20:08They were designed for you to be able to tilt your keyboard.
20:11This way, you can actually see which keys you're hitting.
20:14At the same time, a flat keyboard doesn't make your wrists so tired,
20:17and people who can type without looking at the keyboard don't need those legs whatsoever.
20:22An olive spoon is usually made of stainless steel and has a small hole cut in its bowl-shaped head.
20:28The main purpose of this utensil is to lift olives, cherries, pickled garlic, and other products from liquid-filled jars,
20:36cans, or bowls.
20:37The hole in the middle allows you to drain the liquid gathering in the spoon fast and easily.
20:42What'll they think of next?
20:44Donuts are shaped like rings because, otherwise, they get overdone at the edges and remain uncooked and gooey inside.
20:51Make a hole in the center, and both the outsides and the insides will be cooked at the same time.
20:56Round-shaped donuts with no holes are usually filled with custard, cream, or jelly.
21:02Such donuts don't have any corners, which means there are fewer weak spots for the filling to spurt out from.
21:09If you grab a full juice box a bit too firmly, you can get sticky liquid all over the place.
21:14To avoid such situations, flip up the tabs on the sides of the juice box.
21:19You can use them to hold your drink.
21:21Some cars have a tiny coffee cup sign on the dashboard.
21:24It's the vehicle's anti-drowsiness mechanism.
21:28Some manufacturers equip their cars with a drowsiness detection system.
21:32It analyzes the speed, wheel angle, and lane deviations, and figures out if it's time for the driver to take
21:38a break.
21:39If it is, the vehicle makes several audio signals, and the coffee cup sign starts to flash.
21:45Produce stickers on fruit and veggies you get at the supermarket are full of information.
21:49If there's a four-digit code on the sticker, the product was grown conventionally.
21:54In most cases, it also means that pesticides were used in the process.
21:58If the product is organic, its sticker has five digits, and the first one is nine.
22:04Genetically modified products also have a five-digit code, but the first number is eight.
22:10Sugar used to be sold in sugar loaves.
22:13Those were tall, hard cones.
22:15At those times, to get sugar ready for tea, people had to use special hammers to break a loaf apart
22:21first.
22:22After that, they cut the sugar into smaller and more nicely shaped lumps.
22:26Only in the middle of the 19th century, people invented the first press that cut sugar into cubes.
22:32This way, the product was easier to store and transport.
22:35A little hole in the end of your wrench can provide your screwdriver with some extra torque.
22:40Just slide the end with the hole over the screwdriver.
22:43You can also use this method when the angle is awkward.
22:46While driving, when it's already dark, you might get blinded by the headlights of the car moving behind yours.
22:52If you have a manual rear-view mirror, find a tab at the bottom and flip it.
22:57The mirror has a reflective material behind its glass.
23:00By flipping the tab, you change the angle of this material, dimming the lights in the mirror.
23:05Most ice cream scoopers come in different colors.
23:08It has nothing to do with aesthetics.
23:11The color indicates the size of the scoop.
23:13This way, you can easily figure out how many scoops you'll need to fill 32 ounces.
23:18Wow, a 32-ounce sundae!
23:20Sign me up!
23:21Some caps on small tubes are hollow on top and have a little spike inside.
23:26Its purpose is to break the foil sticker sealing the tube.
23:30The neck fits right in this hole, and the spike is designed to break the seal.
23:34This way, you don't need to tear the tiny foil seal off with your fingers.
23:38The letter R in a circle on the product's packaging means that the trademark is officially registered.
23:45Once it's done, the trademark's owner has the right to place this letter on all their products.
23:50They can also sue anyone who tries to use their trademark.
23:53A gas pump usually has a small metal latch or hook on its handle.
23:58That's a trigger lock.
23:59You can use it to lock the handle in the open position.
24:02Then the gas will keep pumping even if you walk away.
24:06Coins used to be shaped randomly or have no shape whatsoever in the past.
24:10Dishonest people used it to their advantage.
24:13They stole valuable metals the coins were made of by chipping their corners off.
24:17It was illegal, and to prevent this kind of fraud, round coins were invented.
24:22After that, it became easy to instantly notice when a coin had been fiddled with.
24:27Those two holes in a lollipop stick are there to hold the candy in place.
24:32When the stick is dipped in hot liquid syrup, it flows into the holes and solidifies.
24:36Now, your suite is there to stay.
24:39Fabric squares that come with clothes are for you to try out your cleaning products on them first.
24:44This way, you won't ruin the entire item once you decide to wash it.
24:49The holes in the bottoms of earphones allow air to circulate up and through the speakers.
24:54It helps to increase low frequencies, making the bass sound deeper.
24:58The sound quality also becomes much better.
25:00Don't I sound better? Thank you.
25:02You can adjust your stapler so that it staples documents together only temporarily.
25:07It's done by rotating the crimp area.
25:10Most staplers have two options for stapling.
25:13One is standard, but the other side bends staples away from the center.
25:17Later, when you don't need them anymore, you can easily remove them by hand.
25:21If you store peanut butter jars upside down, the oil will move to the bottom, and all the solids will
25:28be on top.
25:28Hey, don't laugh. That matters to some people.
25:31You don't want to get caught with your peanut butter down.
25:37So get this.
25:38An extra hole at the upper part of the sink has multiple hidden functions.
25:42First, in case someone forgets to close the tap, the water won't overflow and the bathroom won't get flooded.
25:48Second, thanks to that hole, the water drains faster and it gives an escape for the air, helping the water
25:53flow down.
25:55Those two holes on a side of any Converse shoe are not only to let the stinky air out.
26:01Sure, breathability is important for any athlete.
26:03The second reason is that athletes lace through those holes to get a better grip.
26:10Donuts have a hole in the middle and it doesn't stand for O in donut.
26:14It's not designed for an easier grip either, though it can be quite convenient.
26:18It's actually made this way for mass baking, so that they can cook all the way through evenly.
26:25Baby carrots are tiny and, unlike regular carrots, wet.
26:29Baby carrots aren't some special sort of carrots.
26:31They're actually made of regular carrots by cutting off the skin and outer layers and then polishing them to look
26:37that pretty.
26:38The problem is that they can't retain moisture.
26:41A regular carrot retains some water inside because of the layers that locks it in.
26:45Once they're chopped out, baby carrots can dry out easily.
26:48So they usually sell them in bags with some water inside.
26:53Toy stores are filled with Beanie Baby plush toys.
26:56And a detail that is even more iconic than their huge eyes is their tags, saying TY.
27:02That's a small manufacturing company not so many people have heard of.
27:05Beanie Babies appeared in 1993 and they went insanely popular.
27:10TY is the name of the company, but it's not an abbreviation.
27:13It's the actual name of the company's founder, H. Ty Warner.
27:19Most metallic zippers have a hidden lock inside them to save you from awkward situations, such as an undone fly.
27:26Oh boy.
27:27Don't leave the zipper handle in an upward position.
27:30When you pull it downwards, it automatically locks.
27:32It's all thanks to those tiny grooves hidden underneath the handle.
27:38Almost any public toilet has a large gap between the floor and the door.
27:42The reason for such a zero-privacy thing is to actually minimize the level of privacy and comfort,
27:48so that people wouldn't stay there long and there'd be no lines.
27:51It's also easier to clean, and safer if some emergency occurs.
27:58Headrests in a car are about comfort, and detachable headrests are about safety.
28:03If you pull the headrest out of a seat, you'll see two bars, which are quite sturdy.
28:08If you ever get locked or trapped in a car, you can get out of there smashing the window with
28:13these bars.
28:17Many cups and mugs have little grooves on the bottom on purpose.
28:20They're designed for dishwashing machines.
28:22Sometimes, the grooves let the water flow and not spill over your feet when you take the cup out.
28:27Also, those grooves let the air flow so the cup doesn't crack even if the tea is scalding.
28:35Almost all measuring tapes have a metal tip with a small slot on the end.
28:39You can use this slot to hang the tape on a nail or a screw to make measurements without anyone's
28:44help.
28:46Sometimes, this tip has a row of sharp points along the edge on one side.
28:50That comes in handy when you want to leave a mark without using a pencil.
28:55Doorknobs are usually made of brass, bronze, and some other copper alloys for a reason.
29:00They have an antibacterial effect, so they stop microbes from spreading.
29:05They get rid of a range of harmful germs pretty fast within a couple of hours.
29:10But don't forget to wash your hands anyway.
29:14Grocery carts have loops for a reason.
29:16You don't want to put your jacket in a cart next to potatoes and onions.
29:20Hang it on a loop.
29:22This little hook-like thing is there to help you better organize the space in your cart.
29:26The carts also have a super handy grid.
29:29Whenever the cart's full, you just need to lift the grid and attach the shopping basket for extra purchases.
29:34Placing it in between the horizontal bar above the wheels and the hooks the grid has.
29:41A point in an ointment cap is there for a reason too.
29:45Most tubes are usually sealed with foil, and it's better to avoid opening it with fingers unless you're ready to
29:50say goodbye to your nails.
29:52A point easily opens even the most safely sealed tube.
29:58Silica gel can often be found in different things you buy like bags, shoes, and many others.
30:03Don't throw it away.
30:05It's meant to absorb excess moisture.
30:07So anytime your shoes are a bit wet, just throw in a packet with silica gel.
30:13People used to co-live with rats, and these guys like gnawing on everything they see in their way, including
30:19paper.
30:21Still, rats weren't able to chew more than the space left on the margins.
30:27That black grate on a microwave isn't just some fancy decoration.
30:30It's called a Faraday shield, and it prevents the rays from escaping the microwave.
30:35It also speeds up the heating, so you can enjoy yesterday's leftovers faster.
30:40It may also block phone signals.
30:42So if you're tired of numerous calls, just put the phone into a microwave.
30:46But don't turn it on.
30:50All Tic Tac containers are designed to dispense one Tic Tac every time you open it.
30:55The lid has the same shape as the candy.
30:58Turn the container upside down, gently shake it, and open it slowly.
31:01You'll notice only one candy stuck between those lid grooves.
31:05So if you just open the container and shake it until five or even more candies fall into your mouth,
31:10it means you've been eating Tic Tacs wrong all this time.
31:17Those little holes in the airplane windows are designed to control the cabin pressure.
31:21They also protect the windows from fogging up as the temperatures drop and rise.
31:25By the way, the airplane window is round for a reason.
31:28This way, pressure is evenly distributed so it doesn't get deformed.
31:35Blue bristles on a toothbrush are actually an indicator that it's just about time to change the brush.
31:40As the bristles get in contact with water, the blue, or whatever other, pigment fades away.
31:45So the more you use it, the duller the color becomes.
31:50A triple handle on a jerry can is there to make it easier for two people to carry it and
31:54distribute the fuel evenly.
31:56Gas cans often have a second hole that actually needs to be unkept too before you pour the gas.
32:01The air passage will prevent it from pouring out, so no more fuel waste.
32:07Jeans first appeared in 1873.
32:10They were invented by Jacob Davis and Levi Strauss.
32:14Davis was a tailor who was producing covers and tents,
32:17and Strauss was a businessman who, among other things, was selling cloth.
32:22The first jeans were made by Davis from denim, the fabric he bought from Levi Strauss and co.
32:29Together, they patented the design.
32:31Blue was a standard color for denim that was dyed using an indigo dye.
32:36The blue color is a tradition that is still often followed today to replicate the original look of a pair
32:41of jeans.
32:42Jeans also have metal rivets, and they've been there from the very beginning.
32:46Jacob Davis, the man who made the first pair of jeans,
32:49added copper rivets to spots where pants were more likely to rip,
32:53flies and pockets to make them stronger.
32:55Today, they have more of a decorative purpose since they're distinctive and traditional for jeans.
33:02Another special thing about jeans is those tiny pockets they have that seemingly serve no purpose.
33:08Well, maybe it's true now, but years ago, when many cowboys were wearing jeans,
33:12the pocket was made specifically to keep a pocket watch there.
33:16Also, back then, a pair of jeans had just four pockets.
33:19That tiny pocket, the watch pocket, two big pockets in front, and just one pocket on the back.
33:27Many zippers have the letters YKK engraved on them.
33:31It's an abbreviation that stands for the name of the company that can be translated as
33:36Yoshida Manufacturing Shareholding Company.
33:39This Japanese company is the largest zipper manufacturer in the world,
33:42so they put their initials on all the zippers they produce.
33:45That's around half of the zippers in the world.
33:48And that's why you see their zippers more often than any other zippers.
33:54Those little white golf balls have dimples all over them.
33:57It turns out they aren't there just randomly.
33:59At first, golfers were playing with a smooth ball.
34:02With time, the ball would get all punched and damaged,
34:05but also, it would start to travel way further.
34:07The reason here is aerodynamics.
34:10Dimples allow the air to flow more smoothly around the ball, taking it further.
34:15So the idea was adopted, and the balls got their dimples all around,
34:18allowing them to travel longer distances.
34:22To this point, I saw you left the ball on the wall outside of the wall right on
34:22That start talking about the
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