- 7 hours ago
Unveiling the truth behind planned obsolescence, this video reveals how to tap into the 'Hidden Component' in everyday gadgets. Learn the tricks that professional repairmen use to make quick cash while you could be saving it instead. Dive into the world of 'Invisible Assets' and discover how to restore your tech in seconds with items you already own. Get ready to transform your junk drawer into a treasure chest of solutions!
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00:00Some pieces of clothing come with a small patch of fabric with a button on it.
00:04While it's quite obvious how to use the button, the fabric's purpose isn't so apparent.
00:09It's not there to patch holes. You're supposed to test your cleaning products on it.
00:14Then, if something goes wrong, you won't ruin the whole garment.
00:17The seemingly random dime-sized hole in the elevator door is actually a keyhole.
00:23If the elevator doors get stuck, an operator can open them manually by inserting a special key in this hole.
00:30The same tool is used when an elevator needs routine maintenance.
00:34Some plastic milk containers have dents in their sides that serve several purposes.
00:38For one, if milk spoils, this process can cause swelling and high-pressure buildup inside the container.
00:45That's when the dent comes in handy. It pops out and doesn't let the jug blow up.
00:49Plus, if you decide to freeze the milk, it'll expand like any other liquid.
00:54And then again, the indentation will pop out and prevent the container from bursting inside the freezer.
01:00A first-timer might think that Chinese takeaway boxes have a peculiar shape.
01:05The more experienced diners know that by unfolding the sides of these containers, you get a paper plate with the
01:11food already sitting on top.
01:13The lines on plastic solo cups can help you measure out liquids and non-liquids too.
01:18From the bottom up, those lines coincide with the measurements of 1, 5, and 12 ounces.
01:24The lowermost line is the perfect portion of mouthwash.
01:28The middle one is a serving of cereal for breakfast.
01:30And the topmost is the amount of water recommended to drink 4 to 5 times a day.
01:37Striped toothpaste will always come out in stripes even if you mash the tube with all your strength.
01:42No magic involved though.
01:44The product is very dense and viscous, so it doesn't mix well.
01:48The white, blue, and red parts of the toothpaste are pushed down at an even rate thanks to their similar
01:53physical properties.
01:55And viscosity helps the stuff be pushed down and out from the edges first, so no matter how hard you
02:01try, there will always be those perfect stripes.
02:04Not every iPhone owner pays attention to an almost unnoticeable little hole between the camera and the flash.
02:11It's the gadget's second microphone.
02:14Its role is to block outside noises when you're filming a video.
02:17This microphone also makes the sound clearer.
02:20Use it when you're on the phone in a noisy place.
02:23Dental floss can slip out from your fingers and tangle.
02:26To avoid such problems, tear off a piece and floss and tie its two ends together.
02:31It will be much easier to use and won't hurt your hands.
02:35Most frying pans have holes in their handles.
02:38You can use it to hang the thing on a hook on the wall, but that's not its original purpose.
02:42When you're cooking something in the pan, the hole in the handle is there to hold your messy spoon.
02:47It's especially important for plastic utensils because you can't leave them in the pan for long since they can melt.
02:55Some toothpicks have several grooves on the blunt end.
02:58When you need to use one, break off the grooved end and put it on the table.
03:02It'll serve as a rest to keep your toothpick from touching the surface.
03:06You've probably noticed that most soft-rink lids have ridges and three bumps on them.
03:12With their help, the lid can turn into a coaster once you put it on the table and place the
03:16cup on top of it.
03:17No more spillage!
03:19Bath foam isn't only for fun or a nice smell.
03:22It also helps regulate the temperature.
03:25The bubbles keep the water hot so you can enjoy a bath a bit longer.
03:30Anyway, it works for acrylic bathtubs only.
03:32Those made of metal lose heat really fast either way.
03:36Almost all measuring tapes have a metal tip with a small slot on the end.
03:40You can use this slot to hang the tape on a nail or a screw to make measurements without anyone's
03:46help.
03:46Sometimes this tip has a row of sharp points along the edge on one side.
03:50That comes in handy when you want to leave a mark without using a pencil.
03:56A pack of cotton pads has those strings on it so we could hang it on some hook or holder.
04:01And no, there's no need to untighten and tighten the pack again.
04:05Look at the bottom of the pack.
04:07It has a perforated line.
04:09Tear along that and now you're good to pull out a cotton pad.
04:13A triple handle on a jerry can is there to make it easier for two people to carry it and
04:17distribute the fuel evenly.
04:19Gas cans often have a second hole that actually needs to be uncapped too before you pour the gas.
04:25The air passage will prevent it from pouring out.
04:28Lemons get juicier if you warm them up a little bit in the microwave.
04:32The heat softens the frozen membranes so the juice can flow out freely.
04:36More lemonade for you!
04:37When you buy some grated cheese, get ready for a surprise.
04:41If the package says it contains cellulose, it means that the cheese does contain wood pulp.
04:47Don't worry, it's digestible.
04:49It's added to prevent the product from clumping.
04:53The expiration date on mineral water isn't about water going bad.
04:57Actually, no water can spoil, but the bottle can.
05:01Over time, it starts leaking some chemicals that aren't quite safe.
05:05The spike in the cap of a tube of ointment or cream is there so you can puncture the tiny
05:10foil seal.
05:11No need to grab a toothpick or try to use your fingernails to peel it off.
05:16Post-it notes are supposed to be peeled off from the side like you're turning the page in a book.
05:21Most of us tear them from the bottom, and that just creates a crease and makes the whole note less
05:26sticky.
05:27To prevent water from boiling over, just lay a wooden spoon across the rim of the pot.
05:32It only works for a little while, though.
05:34If the spoon's surface gets heated up to the boiling point, the bubbles will just foam up and around it.
05:40That's why metal spoons won't do.
05:41They heat up too quickly.
05:44Some erasers have two colors and textures.
05:47Not for pen ink versus pencil lead, but for different types of paper.
05:50However, you're supposed to use the blue side to remove pencil marks from heavy grades of paper.
05:57Most people use bobby pins upside down.
05:59The zigzagged part goes closer to your scalp.
06:02The texture keeps the hair and pin in place much better.
06:06And give your pins a spritz of hairspray before putting them in.
06:09They'll grip better.
06:11Ever notice the tiny second hole in the lid of your coffee travel mug or to-go cup?
06:16It's there to control how smoothly the liquid flows out from the drink hole.
06:19Without it, the hot stuff would just glug out at you like milk from a jug.
06:24It also lets the steam escape so the high temperature and built-up pressure don't melt the lid or send
06:29it shooting off.
06:31Apples you buy at the supermarket were likely picked between August and November.
06:36After that, they were covered in wax, hot air dried, and stored in cool places.
06:41It takes the fruit 6 to 12 months to make it to fresh produce shelves.
06:46Sometimes, you need to get away from your computer but don't want to keep logging back in.
06:51Put your mouse over the top of an analog watch.
06:54The mouse will perceive the ticking second-hands movement, and this will prevent your computer screen from turning black.
07:01When using a blender, pour the liquids in it first.
07:04Only after adding your milk, coconut water, or yogurt, put the berries, fruit, or spinach inside.
07:11Thanks to the holes in the bottoms of earphones, air can circulate up and down through the speakers.
07:16It results in increased low frequencies.
07:18This makes the bass sound deeper and improves the overall sound quality.
07:24You can use metal loops on the sides of a grocery cart to organize the space in your cart better.
07:29Hang your jacket on such a loop or put a bag of delicate items there, like eggs or bread.
07:34This way your jacket won't get wrinkled and eggs won't get squished.
07:39The black lines on a basketball make the game easier to play.
07:43They're actually grooves, helping you handle the ball.
07:46And since the players need to move around the court while dribbling or bouncing the ball, control is crucial.
07:53The black lines allow you to grip the ball better.
07:56You can also easily steer it in any direction once it's in your hand.
08:01If the basketball was smooth, you wouldn't be able to do it.
08:04By the way, pebbled dots that cover the outside of the ball serve the same purpose.
08:09The drawer at the bottom of your stove is there to keep your dishes warm when you cook large amounts
08:14of food.
08:15When one dish is in the oven, the already prepared ones are kept warm in the drawer below.
08:21Okay, today I'll show you things you've never seen and tell you stuff you never knew.
08:27Wow, all in one video! What a bargain!
08:30For example, these soda found stations in fast food restaurants.
08:34We all see the nice side of it, but have you ever wondered where all this soda comes from?
08:38Let me take you behind the scenes.
08:41Ta-da!
08:42Turns out it's a pile of boxes with tubes.
08:45So when the drink runs out, the employees change the box and plug the tube back in.
08:50Okay, let's peek into a couple more places where we normally don't belong.
08:55This is, for example, what you will see if you cut the screen of a Mac open.
09:00And here's what's hidden behind the dryers in a public laundromat.
09:04Today, 4 out of 5 households in the U.S. have a dryer.
09:08But they weren't so widely accessible when they first appeared in the 1950s,
09:12because they were way too expensive for the average homeowner.
09:16Now, grocery shopping isn't an uncommon practice,
09:19and we all have walked past dairy fridges a million times.
09:22But have you ever wondered what's behind them?
09:25Turns out they're just shelves, and store employees stack the products from the other side.
09:30It makes perfect sense, but I never imagined it like this.
09:34Now, this photo shows what's behind the elevator button.
09:38Obviously, a bunch of cords.
09:39The buttons are all wired to a computer that manages the elevator.
09:43How does the computer know where the elevator is at a particular time?
09:47Well, there are several possible systems.
09:50But the most common one is a long vertical tape in the shaft with a series of holes.
09:55A sensor counts the number of holes that are passed, and that's how the location is determined.
10:01Okay, there are a couple of common things we all know, but the purpose of which remains a mystery to
10:07most.
10:08So, let me share these secrets with you.
10:10Those metal rivets on jeans have been there from the very beginning.
10:15Jacob Davis, the iconic man who made the first pair of jeans,
10:19added copper rivets to places where pants are most likely to rip.
10:23Today, they have more of a decorative and distinctive purpose,
10:26since they are a traditional attribute of the jeans everyone knows of.
10:30Now, I'll bet you know there are extra loops on some shoes.
10:34No, they're not for sweat or ventilation.
10:37Those are extra loops for laces, just like other loops you use.
10:41But they're there to tie your shoe around the ankle to prevent your foot from moving aside.
10:46That's especially helpful if you're hiking and ascending and descending hills and trails.
10:51Now, have you ever noticed those half-belt thingies many coats and jackets have at the back?
10:57Turns out, they first appeared on oversized military jackets.
11:01So, the extra fabric could be collected on the back, and the person doesn't stumble when working.
11:06Today, those belts are only added for the sake of style and tradition.
11:10Most clothing items you buy come with a small bag of fabric or a button, or both.
11:16These are actually not useless.
11:18Buttons, obviously, can be replaced if you lost the original one.
11:22Pieces of fabric can serve two purposes.
11:24You can patch up the hole, but the main purpose is to provide you with a sample of cloth,
11:29so you can use it to test different washing products on it and see what happens to the fabric.
11:35Now, pom-poms on woolen hats.
11:38Did you know that sailors were wearing hats with pom-poms in the 18th century to protect their heads in
11:44case they accidentally whacked them?
11:46Regular people were wearing them in Scotland, and the color of the pom-pom signified the person's social status.
11:53People got back to wearing hats with those cute decorative items during the Great Depression.
11:57They're made of spare yarn, so it was a cheap way to decorate your hat.
12:01Now, if you haven't noticed, some sidewalks have little plates with bumps on them.
12:07Most people don't pay much attention to them, but they're very important for visually impaired people.
12:12It signals a slope that then leads to a crosswalk.
12:16Also, several patterns signal different things.
12:19Have you noticed that the icon of a gas tank on car dashboards has a little arrow next to it?
12:25Well, the arrow has a purpose.
12:27It points at the side of the car where the gas tank is located.
12:31Very useful for forgetful people, like me, who constantly wonder which side it is on,
12:37and also for those who drive rentals once in a while.
12:40The answer is right in front of your eyes.
12:42If you can't find the arrow on your panel, then the fuel hose on the icon indicates the side instead.
12:49Now, on the back of many makeup and hygiene products,
12:52you'll find this symbol with a marking like 6M, 12M, and 24M.
12:57This is the number of months this product can serve you before you should toss it out.
13:02You might know that whistles work perfectly fine even if they don't have that ball inside.
13:08And yet, they have it.
13:09But why?
13:10Even though there's a sound without the ball, the noise it creates is very flat, and it's not distinguishable enough.
13:17When the whistle has a ball inside, then it starts moving with every blow,
13:22indicating different pitches and making the noise more noticeable.
13:26Lollipop sticks have those squared holes on the end of their sticks for a reason, too.
13:31When the candy is put on the stick, some of it goes into the hole, fixating the candy part.
13:37This way, the candy ball or whatever shape is less likely to fall off the stick.
13:42Yeah, it's a bummer when that happens.
13:44Measuring tapes have that little metal stud on the end.
13:48Most people know that you can use it to stick it to the side of the surface you're measuring.
13:52But it's not the only cool thing about it.
13:55Look, there's also a small slot.
13:57And this slot can be used to hang it on a nail.
14:00Again, to free your hands and keep measuring.
14:02The bottom of the end of the tape has a ridged edge.
14:06It'll help you make a mark if you don't have a marking tool with you.
14:10Have you ever wondered why the tape's blade is curved?
14:13Well, it helps to keep it rigid when extended.
14:17Pay a closer look at the blade.
14:19Apart from numbers and markings, there are also black diamonds.
14:23Those are there every 12.2 inches,
14:26and they're useful for construction workers to space engineering joists.
14:30They can also be useful for you.
14:32If you want to hang something heavy, for example.
14:35The diamond will mark the exact center of a stud,
14:38which is placed 16 inches apart from one another.
14:41And you can drill something to that center to make sure whatever you hang is safely attached.
14:47Now, most coins have ridges.
14:50And this is the legacy of the olden days.
14:52You see, back in the day, all coins were linked to a silver standard.
14:56The amount of silver used in the coin was proportionate to the value of the coin.
15:01So, the more actual silver was used to make the coin, the higher its value was.
15:06Hi-ho silver!
15:08Do you remember the Lone Ranger?
15:09Silver was the name of his horse.
15:12Eh, never mind.
15:13Anyway, all the coins had precious metal in them,
15:16and some people started shaving off a little bit of silver from it.
15:20It wasn't noticeable on one, but if done on several, people could get quite a bit of that precious metal.
15:27So, to prevent fraud, the edges were made with ridges for security reasons.
15:32So, if someone attempted to shave it off, the ridges would disappear, and no one would accept that coin anymore.
15:38Smart!
15:39Today, no one makes coins out of silver.
15:42The coins just represent the value.
15:44But the ridges are kind of a cultural heritage now.
15:47And finally, a typical plastic milk jug often has inverted circles on one or more of the sides.
15:54Not like alien crop circles.
15:56This dimple is there to make the jug more resistant,
15:59and to prevent it from erupting in case the jug falls on the floor.
16:03The dimple gives some more space for the liquid to expand.
16:06Also, as the expiration date approaches, the microbes in the milk start to expel some gases.
16:12As there are more of them trapped inside, the pressure in the jug is rising.
16:17The dimple takes care of the expansion and prevents the jug from exploding.
16:21And the cows are utterly delighted that their hard work is not wasted.
16:26Me!
16:30Okay, I know it's kind of cold to the touch, especially on a freezing winter's day.
16:34But did you know that brass doorknobs actually serve a purpose apart from looking classy and shiny?
16:39Since it's a copper alloy, brass has antimicrobial properties.
16:43That means it can help get rid of harmful germs and bacteria, sometimes in up to two hours.
16:49In high-traffic areas, that's all the more useful.
16:51But since brass is much costlier than other metals like nickel and steel,
16:55you barely see these types of doorknobs anymore nowadays.
16:59Speaking of lovely multi-purpose items, most screwdrivers have a tiny little secret of their own.
17:04They can sometimes be slid through a wrench so that they can be used to create more torque when twisting.
17:10Not to mention the uses when it comes to bolts in hard-to-reach places.
17:15There's a reason why buttons on women's shirts are for the left-handed, and it has nothing to do with
17:20fashion.
17:20This practice dates back to the times when chambermaids were helping ladies dress themselves,
17:25and it was easier for them to perform their job with this orientation.
17:30Having the buttons placed as such indicated a sign of wealth,
17:34so it's easy to imagine why the practice carried on, even though most people dress themselves nowadays.
17:40Next time you receive a package in your mail, take a look at your box cutter.
17:44If it features some diagonal lines on the blade, you're in for a little design perk.
17:48Turns out that these are blades that snap off.
17:52Continuously cutting cardboard can dull the sharp edge of the blade.
17:55To help prevent the need to buy a brand new box cutter,
17:58the top segment along the next line can be broken off to reach a new sharp edge.
18:03To do this, check out the small hole at the base of the tool, sometimes called the blade snapper.
18:09The people that first came up with this brilliant invention were engineers,
18:13inspired by the way chocolate bars are segmented.
18:16Hold on a minute.
18:16Don't throw away the cardboard package just yet.
18:19Most likely, you'll have some silica gel packets somewhere at the bottom of the box.
18:23Since this gel is basically a drying tool, it gathers up the moisture out of its environment,
18:28so you can store these packets for further occasions.
18:31Whether you'll need to dry out your phone or some other electrical object,
18:35you can place them in a container next to the silica gel to reduce the damage.
18:40You don't have to be a mechanic to know when a standard car tire needs replacing,
18:44since they come equipped with a neat indicator.
18:47Take a closer look, and you'll see that treads within the tire are a bunch of rubber notches.
18:52When the treads are evened out with the perpendicular bars,
18:55it's a sign you need to book an appointment with your local car service.
18:59Since most likely, the tires have lost most of their traction and may not be safe for driving any longer.
19:05The upper corners of a car windshield feature textured black dots melted into the glass edges.
19:11This neat add-on isn't there for design purposes.
19:14It's called frit glazing,
19:16which means that a special type of ceramic paint is added to the window for protecting its sealant from UV
19:23rays.
19:24It also conceals and creates a coarser surface for the adhesive used to set the window in place.
19:31Whenever you're up for a drive, check out if there's a small tab under your car's rear-view mirror.
19:37Bet you didn't know it's there to help switch the mirror from daytime to nighttime views.
19:42It uses a prismatic glass technology to blur the reflection and reduce the glare of headlights behind you in traffic.
19:50People came up with these manually tilted mirrors in the 1930s, but they became standard somewhere in the 1970s.
19:57While you're in the car, check out the headrests, as you most likely don't know that they carry a little
20:03disguised purpose.
20:04Of course, they're adjustable to accommodate passengers of any height so that they get the proper support for their heads
20:10and necks.
20:11The hidden feature is that they are detachable and come with two very solid metal bars.
20:17Should you ever find yourself stuck in a car and need to make a fast getaway?
20:21These bars come in handy to crack out the car windows.
20:24So you're out for a drive and you're suddenly out of gas.
20:28What I'm about to describe sounds more like a meme than an actual situation bound to happen.
20:33But what if you're in such a hurry that you accidentally drive off with the gas nozzle still in the
20:38tank?
20:39Well, the nozzles have been designed to prevent any hazards from happening, rest assured.
20:44They feature a breakaway device that will allow the hose to separate when taken out with enough force.
20:51Initially designed in the early 20th century to be worn exclusively by basketball players, sneakers soon became one of those
20:58fashion fundamentals, similar to jeans and leather jackets.
21:01If you take a closer look at them, you'll see they have two extra holes on the side, similar to
21:06the shoelace holes.
21:07They're manufactured as such, not only to provide extra ventilation, but to allow people to get extra creative with their
21:14laces when wearing the shoes.
21:16Admit it, you've always thought that chopsticks are merged at the end for the sole purpose of keeping them together
21:21until you're ready to dig into your meal.
21:23That may or may not be the whole truth.
21:25Under a more detailed inspection, the wooden tools feature a square-shaped end.
21:31Chopsticks manufactured like this date back to an old Japanese traditional design, which can help with breaking the ends easily.
21:38The separated end can then be used as a resting block for the chopsticks to keep it more sanitized in
21:44hopes it can be used again, since they won't be touching the table or any other surface.
21:50Women's bikes have a special design, which, surprisingly, has a historical and fashionable purpose.
21:56The lower frame is for the most part meant to make up for the generally shorter height of ladies, compared
22:01to that of the average gentleman.
22:03While that is the case for handlebars and saddles, the overall frame is lower for an additional purpose.
22:09Way back when women wore long skirts and dresses all day, every day they needed to make sure their outfits
22:15wouldn't get caught in the frame.
22:17That's how we came up with a lower-framed bicycle, perfectly made for women and their needs at the time.
22:24The fact that toothpastes are multicolored is not just a nice perk to make dental hygiene more fun.
22:30There's a secret meaning related to each of the colors, which dates back to the 1970s.
22:35In those days, people grew more and more interested in their oral health care.
22:40And as such, they were looking for products which could do more than merely clean their teeth.
22:46One company was the pioneer in that regard, adding mouthwash to its toothpaste, meaning the blue strip.
22:52They later added on the red strip, meant to feature ingredients which helped with gum care.
22:58Speaking of toothpaste, check the cap next time you open a new tube.
23:01You may be in for a little surprise.
23:03There's a pointed cone shape inside the cap, so you can puncture the seal of the toothpaste without cutting yourself
23:10or ruining your manicure.
23:11Not to mention, it's more hygienic since you won't be able to transfer germs or other bacteria into the product
23:17itself.
23:19On the subject of bathroom countertop items, toothbrushes come with a neat add-on hidden in the bristle patterns.
23:25Apart from making the toothbrush look cooler, they also do come with a practical purpose.
23:31Most toothbrushes come with a pattern of blue bristles intertwined with white ones.
23:35The blue dye is meant to fade out, signaling the time when you need to replace your toothbrush.
23:41Dentists say that toothbrushes should be replaced every three to four months, but it does serve as a great reminder
23:47in case you forget.
23:48Still love playing with LEGO?
23:50Don't judge. Hey, it's a great hobby for all ages.
23:54Notice there's a hole on top of the LEGO heads?
23:56Behold, you're looking at a safety feature that the people at LEGO designed to prevent choking hazards.
24:03The most dangerous issue should a person swallow any of these pieces is the blocking of the airways.
24:09Designing a hole inside the LEGO head helps the air to flow freely through the piece until it can be
24:14removed safely.
24:16We're now used to all sorts of modern light bulbs, some tubular, some shaped like diamonds, and some even twisted
24:23all together.
24:24Historically, light bulbs were round and the initial shape served a purpose in itself.
24:29It was mainly connected to the fact that glass bulbs were hand-blown, which gave them the round shape to
24:35begin with.
24:36The hidden practical reason was that the light bulb filament needed to be at the same distance from every surface
24:41of the glass sphere.
24:42The easiest way to achieve this was to make the glass in the shape of a globe.
24:50What's hiding inside Coca-Cola cans and regular household batteries?
24:54Why do magnets affect breakfast cereals?
24:58Do crosswalk buttons actually work or are they just useless decorations?
25:03What does that USB symbol really mean?
25:07I'm not sure I know the answers to these and similar questions, but I'm eager to learn the truth together
25:13with you.
25:14Let's find it out.
25:15Coca-Cola cans have a secret few people know about.
25:20Here's a Coke can.
25:21Let's submerge it in a highly corrosive alkaline solution.
25:25The aluminum dissolves due to a process known as hydrolysis, and we can see a plastic liner inside the can.
25:31It's made from a polymer or epoxy resin, and serves as some kind of a protective barrier between the aluminum
25:38walls of the can and the rather acidic soda.
25:42Despite a popular myth, household batteries don't actually contain liquid, and if you accidentally cut them open, no toxic liquid
25:50will spill.
25:51Most of them are dry cell batteries, which are made of electrochemical cells.
25:55Those convert chemical energy into electrical energy.
25:59Larger batteries often house numerous small cells within them, too.
26:04Even Tesla vehicle batteries consist of multiple small cells.
26:07When combined, they easily provide the necessary voltage.
26:13Most toothbrushes have differently colored bristles, but they aren't just pleasing to the eye.
26:18Those bristles, often blue, have a functional purpose.
26:22They're called toothbrush indicators, and their colors fade as you use the brush.
26:26The American Dental Association recommends changing your toothbrush at least four times a year.
26:32And by getting paler, these bristles help you figure out when it's time to replace your toothbrush.
26:38You'll probably agree that there's no better snack than a pack of chips.
26:42Some are flat, others have ridges.
26:44Is it just aesthetics?
26:47Not really.
26:47The main purpose of those lines on some kinds of chips is to help with the distribution of spices and
26:53seasonings.
26:54In other words, all those substances that make your chips taste like cheese are mostly stored inside the lines.
27:00Plus, the lines make chips crunchier.
27:04Now, this one might be a surprise, but some breakfast cereals are magnetic.
27:09That's because they're often fortified with iron in the form of a fine powder.
27:14Due to the added iron, cereal flakes get attracted to magnets.
27:17All this may sound kind of alarming, but in reality, the iron content in the flakes is minimal and doesn't
27:23pose any threat to your health.
27:26That clear fluid in gel pens is called the ink follower or stopper fluid.
27:31The gel in such pens contains pigment particles dissolved in a polymer solution.
27:36The main task of the stopper fluid is to be a barrier to prevent the gel from evaporating or leaking
27:41out.
27:42Without this transparent fluid, your gel pen wouldn't function.
27:47The fluid always stays in one position and doesn't get dissolved with the gel.
27:51Neither does it move backwards or flow out of the pen.
27:56Many pedestrian crosswalk buttons, namely in New York, are placebo buttons.
28:01They do literally nothing when you press them.
28:05Originally, they were functional after being introduced in 1964, but today, most of them don't affect traffic lights,
28:11which are programmed based on the real needs of the traffic flow.
28:15Why do such buttons even exist, then?
28:18It's a simple psychological trick, providing you with an illusion of control.
28:23You might have noticed that movie theater seats are almost always red.
28:28This choice isn't random.
28:30It has strategic importance, which is rooted in visual science.
28:34The thing is, red light has a longer wavelength.
28:37It means that it's the first color to disappear in low light.
28:40It allows the audience to concentrate better on the screen once the movie begins.
28:44Such a design choice enhances the viewing experience by minimizing distractions.
28:50Speed bumps are crucial for pedestrian safety.
28:53But at the same time, they can seriously increase car emissions due to the non-stop acceleration and deceleration they
29:00cause.
29:02To address this issue, some cities, like London, are testing fake speed bumps.
29:07Those are optical illusions painted on the road.
29:10They look raised from a driver's perspective, but in reality, they're flat.
29:15Authorities hope that this approach will slow down drivers without having a negative impact on the environment.
29:22Soda bottles are always filled in such a way that there's some space between the liquid and the cap.
29:28That's because soda contains carbon dioxide.
29:30It's a gas that can expand once the bottle's heated.
29:34If there's no gap in the bottle, it can break because of the pressure building inside.
29:39Also, when you open your drink, the gases go out in the form of bubbles, making the drink overflow.
29:44The gap helps with this problem, too.
29:49The USB symbol, looking like a trident, has always sparked multiple speculations about its origin.
29:57One popular idea is that it represents Neptune's trident and symbolizes power and adaptability.
30:02But there's also a little bit less exciting theory.
30:06A man who claimed to have designed the symbol in the 1980s stated that it was supposed to represent connectivity.
30:13The large circle symbolizes a computer, while the attached shapes, the circle, the triangle, and square, stand for different outputs.
30:23The design of a tennis racket has a specific feature known as the throat.
30:27It's an open space below the head of the racket.
30:31This space isn't just for storing balls, it also improves the racket's aerodynamics by letting air pass through.
30:37It seriously reduces drag during swings.
30:42Speaking of tennis, tennis courts are usually built with a north-south orientation.
30:47It helps minimize the impact of the sun's position during the game,
30:51ensuring that neither player has the sun directly in their eyes.
30:55Look closely at a tram's overhead lines, and you'll see that its contact wires zigzag back and forth instead of
31:02going in a straight line.
31:04That's because all trams have pantographs attached to their roofs.
31:09The upper part of the pantograph is gradually worn down by the overhead wire and eventually needs to be replaced.
31:15To wear it down evenly, the wire is not installed strictly along the tram's path, but in zigzag patterns.
31:23As the tram moves, the pantograph slides along the wire, and it wears down evenly.
31:30Those cone-shaped water cooler cups?
31:33Their shape is intentionally designed to prevent users from setting the cups down.
31:38This allows employees to minimize the risk of spilling water on their desks around various electronic devices.
31:44Plus, less material is used to produce cone-shaped cups, which makes the process less wasteful and more cost-effective.
31:52It also kind of supports sustainability by encouraging people to drink their water quickly and dispose of their cups immediately
31:58after.
32:01Most suitcases have two zipper pulls, and it serves several purposes.
32:06First of all, if one zipper fails, the other can keep the suitcase closed.
32:11Even better, having two zippers allows you to have easier access to small sections of your suitcase without having to
32:18open it entirely.
32:20And finally, when you have two zippers, you can connect them with a padlock for increased security.
32:28Some plastic milk containers have dents on their sides.
32:32These dents serve several purposes.
32:34When milk spoils, it usually causes swelling and high-pressure buildup inside the container.
32:39That's when the dent pops out and doesn't let the jug blow up.
32:43Plus, if you decide to freeze the milk, it will expand like any other fluid.
32:48And then again, the indentation will pop out and prevent the container from breaking inside your freezer.
32:56If you ever had a problem figuring out why fake pockets exist, you need to hear this.
33:02The main reason is that if a clothing item has a specific cut or shape, pockets may spoil it.
33:08They can alter the item's shape either in the warehouse or already on the retail rack.
33:14The solution?
33:15Getting rid of the pockets in key areas.
33:18Plus, fake pockets are obviously cheaper, and they don't get stretched out.
33:24The thermos wasn't actually invented to keep your coffee warm.
33:28It was made by a Scottish scientist who wanted a safe place to keep his chemicals at a stable temperature.
33:35So, he took two bottles, put the smaller one inside the bigger bottle, and vacuumed out the air between them.
33:45Many shirts have two buttons on the cuffs, but only one buttonhole.
33:49So, what is the second button for?
33:52Turns out you can use it whenever you're wearing a watch, so the cuff is looser.
33:58Most clothing items you buy come with a small bag of fabric or a button, or both.
34:04Buttons obviously can be used as a replacement if you lose the original ones.
34:09Pieces of fabric can be used to patch up a hole, but most importantly, it's a tester.
34:14You can use it to test different washing products on it and see what happens to the fabric.
34:21Some umbrellas have a tip at the top, and it turns out it's not just a pretty design.
34:27When going inside on a rainy day, you should just close your umbrella and tap the tip against the floor
34:33to drain the water faster and more effectively.
34:37Many backpacks have this diamond with two parallel cutout slits on its front, and it's there for your comfort.
34:44You can attach something to it, like a water bottle or shoes.
34:48It comes especially handy if you travel somewhere or go hiking, so you don't have to hold your stuff.
34:56Okay, the next thing is gear loops, and probably from the name of it, you already have an idea what
35:02they're there for.
35:02You can strap in some useful gear you need to have with you, like trekking poles or shovels.
35:08Some gear will need to be secured to do it.
35:11Drop the handle through the loop and rotate it upward.
35:14Then, secure it with the elastic hook at the top, and you're golden.
35:20On the back of many makeup and hygiene products, you can find this symbol with a marking, like 6M, 12M,
35:28and 24M.
35:29This is the number of months this product can serve after you open it and before you should throw it
35:36out.
35:37The two sides of a cotton pad are different because each of them has a particular purpose.
35:43A cotton pad has several layers to ensure that it's soft, strong, and can absorb liquids.
35:49The edge is stitched to hold it all together.
35:53The smooth side of a pad is for applying products, like tonics and lotions.
35:58And the embossed side is best for cleansing and makeup removal.
36:03Also, any pack of cotton pads has those strings on the sides.
36:07They're there so you can hang the package somewhere.
36:10Then, you can open the package at the bottom, where the perforated line is, and take them out.
36:17Did you know that there is an efficient way to pull a thread from yarn?
36:21When you pull from the outside, the yarn rolls away, so you need to hold it.
36:26However, if you pull it from the center, it will stay together.
36:31We're all familiar with staplers, but I bet you don't know all its secrets.
36:36Most staplers have a compartment to store spare staples, which can be located either on top or at the bottom.
36:44Also, surprise! This metal plate you press staples against can be turned around.
36:49This way, the device will be able to staple your documents by turning the metal ends outwards.
36:56No need to wonder whether you need to get a smaller or bigger container.
37:00Turns out, plastic food containers have volume measurements on their bottoms, indicating how much food they can fit.
37:08Ceiling fans come with a small switch on the inside of the blade.
37:12You might not have noticed it because it's not in plain sight, so check yours out.
37:17This switch allows you to change the direction of rotation.
37:21Now, why would you want to do that?
37:23The blades of a fan push the air in different directions, depending on the way they rotate.
37:28In the summer, you need the air to be pushed down to create the effect of a breeze.
37:35In the winter, the direction should be changed so that the air is pushed towards the ceiling.
37:40It then heats up before going down the walls.
37:45Have you noticed that the gas tank sign on cars' dashboards has a little arrow next to it?
37:51Well, this arrow has a purpose.
37:54It points at the side of the car where the gas tank is located.
37:57It's very useful for forgetful people who constantly wonder where their gas tank is and also for those who drive
38:04rentals once in a while.
38:05The answer is right in front of your eyes.
38:08If you can't find the arrow on your panel, then the fuel hose on the icon indicates the side instead.
38:17All car tires have 12-digit numbers printed on them, and they're actually important codes for car owners if they
38:23want to get the right tire.
38:25The first letter identifies the type of tire.
38:29P stands for a tire for light passenger cars, and LT is for heavy vehicles.
38:35Then, the following numbers stand for the width of the tire, its radial, and its diameter.
38:43Measuring tapes have that metal stud on the end, which you can use to attach the tape to the surface
38:48you measure.
38:49This way, you don't need to hold it yourself.
38:52But there's also a small slot, which can be used to hang the tape on a nail, again to free
38:58your hands and keep measuring.
39:00The bottom of the end of the tape has a ridged edge.
39:04It will help you make a mark if you don't have a marking tool with you.
39:09On the tape, there are black diamonds that are placed every 19.2 inches.
39:15They're useful for construction workers when spacing engineering joists.
39:19They can also be useful for you if you want to hang something heavy, for example.
39:24The diamond will mark the exact center of a wooden joist.
39:28Those are placed 16 inches apart from one another.
39:32There, you can drill something to that center to make sure whatever you hang is safely attached to the joist,
39:38instead of the unreliable, thin wall.
39:41Pictures will survive, but it's particularly important if you're hanging something heavy.
39:47Did you know that batteries have an expiration date?
39:51Yes, it's printed right on their label, but I've never noticed it before.
39:56The expiration date doesn't mean you can't use it after that.
40:00It's more like a recommended usage period, after which the manufacturer can't guarantee full battery life.
40:08Due to deteriorated components.
40:12These little feet keyboards have are actually a standard.
40:16The height of a keyboard should be adjustable, allowing the angle between 0 degrees and 15 degrees.
40:24The reason to fold the feet out is for you to see the keys better, in case you don't type
40:31blindly.
40:32A little problem that comes with it is that, in this case, your wrists are bent.
40:37And it's not good to keep them in this position for a long time.
40:43Pans have those holes on the ends of their handles.
40:46They're not just there for you to hang them.
40:49You can also place your cooking spoon in there.
40:52It'll hang right above the pan, and the sauce will not spill around.
40:57Make sure to tap off the sauce or food beforehand, though, so that it doesn't go down the spoon's handle.
41:06Stickers with numbers you can find on fruits can tell you some information on how the food was grown.
41:14A four-digit code that starts with a four means that the fruit was grown conventionally, meaning it contains chemicals
41:23and pesticides.
41:24So your best choice should be a fruit with a five-digit number.
41:28And if you see the number nine, it indicates that the fruit is certified organic.
41:36On the bottom of plastic bottles, you can often notice a mark of a triangle with a number engraved in
41:43the middle.
41:44This number specifies the type of plastic that was used to produce the bottle.
41:51These codes help people and local recycling centers to sort returns.
41:56Products that were made of plastic of types one and two are the easiest ones to recycle.
42:04Plastics of types three through seven are tougher to recycle.
42:10Leaving your valuables or a chocolate bar in a car is a no-brainer.
42:15But there are other things people often overlook.
42:18Here's what to watch out for before leaving your car.
42:22Number one is aerosol cans, hairspray, deodorant, spray paint, household cleaner and that sort.
42:29On the back of these cans, you might notice a storage temperature recommendation.
42:33Well, stick to that.
42:35Here's what can happen.
42:37Since these cans are pressurized, they become more sensitive to temperature.
42:41What's inside the aerosol may expand and this may result in a crack.
42:45And then, the can can blow up.
42:48Temperatures above 100 degrees Fahrenheit are already alarming.
42:52And it can easily get as hot as that in your car on a warm summer day.
42:57Researchers from the USA have figured out how long it takes a car to turn into a sweat factory on
43:03a hot day.
43:07Within one hour, the insides of the car parked in the sun reaches 95 degrees Fahrenheit or hotter with an
43:14average temperature of 116 degrees Fahrenheit.
43:18So, if you want your car in one piece and running, take aerosol cans with you.
43:24The second item is sunscreen.
43:28Sunscreen is vital for your skin since it decreases the risk of skin complications and prevents skin aging caused by
43:35the sun.
43:36This includes wrinkles, sagging and age spots.
43:40But when you leave sunscreen in your car, it gets exposed to high temperatures and it can ultimately shorten its
43:46shelf life.
43:47If you end up finding spoiled sunscreen, you might notice a funny smell when you open the cap.
43:53Plus, the heat might cause the cap to open and the sticky substance will get all over the car.
43:59The same rule applies to lipsticks and other cosmetics as well.
44:04The next one is plastic bottles.
44:07There are two reasons why you shouldn't leave them inside your car.
44:11Firstly, a plastic water bottle can act as a lens, magnifying the sun's rays and starting a fire.
44:18A fire department in Oklahoma conducted an experiment and confirmed that the danger of fire was real.
44:25David Richardson from that department says it can happen if the beam of light is focused enough.
44:31The second reason is related to your health.
44:34Many plastic bottles contained by sphenol, a potentially toxic compound, the BPA levels can increase at high temperatures and that
44:43can be harmful to your body.
44:44There's a chance that this chemical can get into your drink after you leave the bottle inside the vehicle.
44:51Oh, and batteries!
44:53They could lose their capacity to work at full power when they're left abandoned in the car.
44:57You can buy a new pair and fix this problem, but it won't be as easy to solve the problem
45:03of leakage or a rupture.
45:05It can be bad for your health because battery acid is dangerous when inhaled and highly corrosive.
45:11The reason for leakage is again related to high temperatures.
45:16Battery manufacturers recommend keeping their products at room temperature.
45:21This fact is partially related to batteries.
45:24It's about electronics.
45:25Have you ever realized how hot your phone can get when it's exposed to the sun?
45:30You're driving and, let's say, looking at the GPS on your phone.
45:34Even in this situation, your phone can heat up.
45:38What will happen to it after hours of sun exposure?
45:41Phone companies are strongly against customers leaving their devices in vehicles because they might shut down, get damaged, or, you
45:49know, boom!
45:52Personal belongings are another priority on the list.
45:55A wallet or a handbag may come to one's mind first.
45:59Yet, a passport or even some change you leave near the passenger seat is sometimes enough to attract a thief.
46:05Better to keep such stuff out of sight, for example, by storing it in the trunk instead of leaving it
46:11in the back seat.
46:14Number 7 is also related to theft.
46:17Life can be too hectic sometimes.
46:19And it's understandable if you can't clean your car frequently.
46:23But leaving garbage in the car is another mistake.
46:26Thieves tend to search for messy-looking cars.
46:28They think that the owner doesn't use such a vehicle frequently.
46:37I know it isn't that common to keep plants in the car on a daily basis, but sometimes you need
46:42to move them.
46:43The heat inside the vehicle can easily dehydrate the poor thing.
46:49Medications are another thing you shouldn't keep in the car for too long.
46:52The constantly changing temperatures inside the vehicle can decrease the effectiveness of your pills.
46:59Authorities recommend keeping most medications at 59 to 77 degrees Fahrenheit in a cool and dry place.
47:07Important documents that contain your personal data shouldn't be left in the vehicle either.
47:13Some examples of such documents are tax forms, financial statements, and school transcripts.
47:19A thief could commit fraud or identity theft using this valuable information.
47:25And there's also food and drinks.
47:28Experts recommend not leaving groceries or leftovers in a warm car for more than two hours,
47:33or only an hour when it's over 90 degrees Fahrenheit.
47:37The same rule applies in the winter too.
47:40Canned foods, for example, have a high risk of going bad.
47:44If a can of sweet peas, let's say, gets frozen in the car,
47:48the effect will be similar to what would happen to soda.
47:51Let it thaw in the refrigerator instead of leaving it at room temperature.
47:55If the product doesn't look or smell normal,
47:58throw it away in a place where not even an animal can find it.
48:01Don't try to taste it.
48:03Just trust your senses.
48:05If the item seems rusted or there are some cracks in the can,
48:09it should end up in the trash too.
48:11Eggs are another example.
48:13Normally, eggs shouldn't be frozen.
48:15But let's suppose you forgot one grocery bag in the trunk of the car
48:19and the weather was so cold at night that the eggs got frozen.
48:22Keep the eggs in the refrigerator before use.
48:25They should be hard cooked.
48:26It's your only option.
48:28You see, freezing causes the yolk to become thick and syrup-like.
48:32It loses that natural flow and doesn't mix well with other ingredients.
48:38You shouldn't leave your pets alone in the car, obviously.
48:42And not just because of a potential rise in temperature.
48:45They will feel uncomfortable without you, their best friend accompanying them.
48:50In their frustration, they might do something to get noticed,
48:53which can be, for example, ruining the interior of the vehicle.
48:58Now let's return to the winter season again.
49:01If possible, keep the gas tank of your car over half full.
49:04This can prevent the fuel lines from freezing.
49:07It also makes it easier to start the engine and hit the road in the morning.
49:11While keeping an eye on the fuel bar,
49:13it might be a good idea to glance at the tire pressure too.
49:16The cold can result in tire pressure drops.
49:22Not only high, but also low temperatures can damage some items.
49:26A good example is paint cans.
49:28They should be quickly taken out of the vehicle in the winter.
49:31The ingredients in the paint can experience expansion,
49:35separation, and clumping due to the cold.
49:38In other words, you won't be able to use this paint anymore.
49:42Weather also affects wooden musical instruments like violins or guitars.
49:48Changes in temperature and humidity can cause wooden instruments to warp, crack, or split.
49:55Glasses get affected by fluctuating temperatures too.
49:58In a hot car, plastic frames can bend.
50:01Or plastic can become brittle when it's very cold.
50:05This makes glasses prone to breaking.
50:08Don't leave house keys and garage door openers inside the car.
50:11This is an everyday practice for many people, but it's risky.
50:15They can get into the wrong hands.
50:18To listen to music, most people connect their phones to the car or listen to the radio.
50:24CDs are getting less and less used these days.
50:27But don't leave them in the car anyway.
50:29They might get warped, and you won't be able to use them anymore.
50:33Can you think of any other items you shouldn't leave in the car?
50:37Did you know that you can actually inflate a balloon without using your lungs?
50:43All you need is a plastic bottle, vinegar, baking soda, a funnel, a rubber band, and a balloon, of course.
50:51First, pull some baking soda into the balloon using your funnel.
50:56And now, pour the vinegar into the bottle.
50:59You don't need a lot.
51:01Just fill about a third of the bottle.
51:03Let's go ahead and put the balloon over the bottle.
51:07But don't tip the soda inside the vinegar yet.
51:10Secure the balloon with a rubber band and tip it over to make the soda fall into the vinegar.
51:15And now you can step back and enjoy the show.
51:19When the baking soda and the vinegar are mixed together, they release CO2 that will inflate the balloon.
51:26You can use the inflated balloon to show your friends another trick.
51:30Grab a comb and rub it on the surface of the balloon.
51:33Now you can bend the water flow in your sink with static electricity using your brand new electrified comb.
51:40Now, just don't try brushing your hair.
51:43Can you really pierce a balloon without popping it?
51:46The answer is yes.
51:49You're going to need a skewer or a long needle, a balloon, petroleum jelly, and some courage.
51:55Scratch the balloon with your fingers and make it more flexible.
51:59Now, blow steadily into the balloon.
52:02Stop before blowing it to the full size.
52:04This will make the trick easier to perform.
52:06Put some petroleum jelly on the needle.
52:09Now, find this darker area near the knot where the balloon is less stretched.
52:14And just pierce it all the way through the top, like this.
52:18Balloons are made up of polymer chains.
52:21They're so tiny that they seem invisible to the human eye.
52:24This trick works because the polymer chains are less stretched on the neck of the balloon.
52:29It was enough room to allow the needle in between the chains without breaking them.
52:34But if you try the same technique on the sides of the balloon, it will definitely pop.
52:40By the way, hairspray actually helps keep the air in the balloon longer by sealing the surface.
52:46But if you apply hairspray on the outside of the balloon and then touch it when it's not yet dry,
52:52the balloon will shrivel.
52:53Isn't it magic?
52:57Beware, our next trick can make you question gravity.
53:01Pour some plain water into a glass bottle.
53:04Not much, about a quarter.
53:06Put the bottle in the microwave for a minute.
53:09Meanwhile, prepare a bowl with colored water to make the trick more visual.
53:14Take the bottle out of the microwave, turn it upside down and pour it into the colored water.
53:20The bottle will soon begin to fill with water.
53:23Can you guess why?
53:25The air expands when it's heated.
53:27The bottle and the air began to cool down and the air contracted, which caused the water to move.
53:34Not only wizards can make things disappear.
53:38Fill a plastic container or transparent glass with sunflower oil.
53:43Dip a glass rod inside the oil.
53:46Can you see it now?
53:48Oil and glass bend light the same way because they have almost equal refractive indexes.
53:54Therefore, it's impossible to see how the wand bends light inside the oil.
53:59To make this trick even more epic, pour equal parts of water and oil inside a glass and dip the
54:06glass rod inside it.
54:08You'll see it in the water, but it will disappear inside the oil.
54:13Have you seen this epic instant freezing trick?
54:16Here's how you can repeat it at home.
54:19Grab a small plastic bottle of clean drinking water.
54:22Leave it for about 4 hours to bring it to room temperature.
54:26And now, put it into a freezer and wait for an hour and a half.
54:30After that, take it out very carefully.
54:34Try not to shake it at all.
54:36Now, hit the bottle strongly or shake it and see what happens.
54:41Not only is red cabbage rich in fiber and vitamins, but it's also pretty useful for homemade scientific experiments.
54:49Boil red cabbage in pure water and wait until the water gets colored.
54:54Red cabbage contains a chemical called anthocyanin.
54:58It changes color when it's mixed with an acid or a base.
55:02That's why if you mix your cabbage with water with different ingredients, you'll get different colors.
55:08Bases like soda will make it blue, but acids, on the contrary, will create reddish colors.
55:14You can prove it by adding some lemon juice to your cabbage water.
55:17The water will become pinkish.
55:21And if you add vinegar, you'll get an even more vibrant pink color.
55:26If you have a juicer, you can try the same experiment with red cabbage juice.
55:31Initially, it will have a more vivid purple color.
55:34But, under the influence of additional liquids, the color will change.
55:39Can you guess which color you'll end up with if you mix cabbage juice with bleach?
55:43It's almost transparent, but still has a greenish-yellow tinge.
55:49The next trick is very trendy among artists.
55:52Here's what you're going to need.
55:54Liquid soap, cotton buds, milk, and acrylic paints.
55:58You can use food coloring for this tip.
56:01Pour a little bit of milk into a wide bowl or a plate.
56:04You don't need a lot.
56:06Then, put a few drops of paint into the milk.
56:09And now, dip a cotton bud covered with soap.
56:12The patterns will begin to change.
56:14That's because the fatty molecules in the milk get attracted to the molecules of soap.
56:20When you're satisfied with the pattern, you can put a sheet of paper on top of the milk.
56:25And voila!
56:26Your abstract masterpiece is ready.
56:29In fact, this technique is related to an ancient paper marbling called ebry.
56:35Artists created colorful patterns by sprinkling and brushing color pigments on a pan of oily water
56:40and then transformed those patterns on paper.
56:45Friction helps people walk on the road instead of sliding on it.
56:48And it also allows us to perform this cool experiment called floating rice.
56:55Fill a small plastic bottle with rice.
56:57You can use a funnel to make the task easier.
57:00Shake the rice for a while.
57:02And now, try to push a chopstick or a pencil inside the bottle.
57:06If you did everything right, the stick will get stuck in the rice.
57:10You can also try using different types of grains and see what happens.
57:15Have you ever tried to put an ice cube into oil?
57:18Well, you can try today.
57:20It will create these cute little drops that will fall into the bottom of the glass
57:24because they're heavier than oil.
57:29Here's an easy way to stick an ice cube to a string without any glue.
57:33Place an ice cube in water.
57:35Put a piece of string on top and sprinkle it with salt.
57:39You don't need much, otherwise the ice will dissolve.
57:42A pinch is enough.
57:44Wait for one minute and then gently pull the string.
57:48And there you go.
57:49The ice has stuck to the string.
57:53For this experiment, you're going to need an empty, clean soda can.
57:57Turn on the kettle and wait until it begins to boil.
58:00Carefully hold the can over the kettle using kitchen tongs.
58:05It will help fill it with hot steam.
58:07When the can is full of steam, give it an ice bath.
58:10You can put it into a bowl with cold water and ice cubes.
58:15The can should wrinkle up right away.
58:17That's because the volume inside the can decreases, reducing its pressure and allowing the external pressure to crush the can.
58:26The next trick is also about air pressure.
58:29You're going to need a glass bottle, a small piece of paper, a lighter, and a peeled, boiled egg.
58:35The diameter of the bottleneck should be less than the width of the egg.
58:39And it's important to use glass because plastic can melt.
58:44Now carefully light the paper.
58:47Let it burn a little bit and drop it inside the bottle.
58:50Put the egg on the neck of the bottle.
58:52It should begin to bounce and soon the pressure of air will push the egg into the bottle.
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