By on May 6, 2007, with 182 Comments

Glass Magic Trick VideoJason Mayoff, Zachary Burgeson and Eric Cole liked this video so much that all of them un-connectedly submitted it for me to publish on Mighty Optical Illusions homepage. I am really puzzled with this one. I browsed the web for explanation, and almost everywhere people said that the fluid this guy is purring is just an ordinary water. I wouldn’t bet my allowance on it.

Allrighty then, I’ll let you smart-asses figure this one for yourselves, since I really don’t have a clue. Can we solve it together? In the past, I believe we managed to solve every single puzzle on this website. I hope that the tradition won’t be stopped today. This is more of a magic trick than optical illusion, but when we solve it, maybe I’ll change my statement. For more illusionary videos, be sure to jump to our videos section. Now employ your gray brain cells, and start thinking!

Comments

182 Responses
  1. Anonymous says:

    i know how he did it he put water in each glass then poured the white stuff in there to make i loook like more after i saw this i tried it too it worked

  2. tnaseth says:

    THERE ARE CYLINDERS INSIDE THE LARGER GLASSES, OR SOMETHING LIKE THAT TO DISPLACE THE WATER TO FILL TO THE TOP OF THE GLASSES

  3. Anonymous says:

    Yeah, you can see the water when he ends. Really simple.

  4. Mark says:

    a baking soda and water mixture in first glass plus a calculated amount of white vinegar in the bottom of each of the larger glasses to make it “foam” more each time.

    great illusion.

  5. Simon says:

    I’m going to go with a water absorbing polymer, like you find in nappies. There is a little water in each glass, which gets absorbed, and the volume of the polymer increases.
    The water already in each glass combined with the volume of the previous glass, does not make the total volume of the new one. The polymer swelling, makes up the rest.
    Think of it like rice. Add a little water, and you get more volume than just the rice and water combined :)

  6. Anonymous says:

    this is another way have some water in the bottom of the glass then pour the white liquid they have different densitys the water has less density the the other that is the only thing that makes sense to me

  7. The Tazelaar's says:

    How can there be a water in the bottom or polymer or anything like that when she poors it back from the large to the small…. the only solution is that the volume of these 4 glasses is all the same. different height different diameter. the tumbler size hold the same amount as the large one but has a different dimension but the same volume of water is there. This is the only explaination there is it has nothing to do with trickery just different dimensions of glasses.

  8. Anonymous says:

    Watch LAST GLASS being filled carefully. You can see the mistake when pouring the liquid. He accidently pours some in the hidden tube and you’ll see the tube fill with some white fluid before he finishes. Typical trick magicians use with trick devices. NOTING to do with density.

  9. Anonymous says:

    I think that there’s 2 illusions here, the 2nd and 3rd glasses got 1/5 of water, remenber 1/5 from the third would be like 1/4 from the second, and then in the last (biggest) glass you can see how the dyed water fall over a spacer!, it forms a cylinder un the middle! look carefully when this person pours it almost in the middle of the video, just after spoiling it!.

  10. Anonymous says:

    yes there is water inside , thats why just pure white glasses were NOT used. and if you notice closer the liquid gets runnier and runnier thus spilling on the last glass furter proving there is water in each glass before hand.

  11. Puzzmaster says:

    No no theres no water in any of the glasses. Just another glass. Because the glasses are blurry, you can’t see that each one has a smaller glass inside it. If you look at the last glass being filled, you can see it just spill over the top of the cup inside.

    I’ve seen this trick done before, and it’s uber cool. But it is still a trick, and not really an optical illusion.

  12. Anonymous says:

    it is amateur….:-S

  13. Anonymous says:

    pause the video at the 38 second mark, you can see a plume of the milky fluid in what has to be water already present in the cup. Furthermore, you can see the water level. of clear water.

  14. Evil Genius Sheep says:

    Notice this:

    The first time around, he leaves all of the glasses on the table, being careful not to move any of them.

    On the second time he picks up every glass before and while filling it.

    SUSPICIOUS!

    I agree with other posters; he had water in the glasses beforehand.

  15. Anonymous says:

    I think Joe is right. There is already some transparent liquid in the glasses, probably water.

  16. Dan says:

    I know there has already been lots of posts on this one.
    As far as I can see, the theory about the glasses already having water in them is the right one.
    I base this on two things
    1. At the end the white liquid is less opaque, which would suggest dilution.
    2. If you look at the largest glass really carefully you can actually see the water level in it and the dilution taking place as it’s poured.

  17. Spellcaster_in_GA says:

    Each Glass has the exact same amount of fluid as the 1st. little glass. The others have clear dividers going down the center, pouring the liquid, it’s poured in front of the divider. Each glass’ divider gets closer to the front… so it takes the same amount of liquid to fill the bigger glasses.
    TA DA!

  18. I-Iybr1d says:

    There sint water or any other liquid on the glasses, what there is, is a cilimdric form on each of the bigguer ones stealling space from the glasses, and therephore making the same amount of milk fill the void around it and making the glass seem filled.

    example:

    |.__.|
    ||..||
    ||..||
    ||..|| The center if ocupied with a cilinder while the rest has the same volume on each glass.

  19. Gogzilla says:

    Alright, I have the 100% correct solution. The theory that there is already water in the glasses ahead of time is correct. But, the theory of there being a cylinder in the middle of the glasses is correct too. Here's how it's done.

    The cylinders in the glasses are hollow & filled with clear water. Notice as he pours, he pours around the cylinders, but as it gets to the top of the glasses, he is pouring on the cylinders & you can see them. Then, when he pours back into the smaller glasses, he pours around the cylinders again (so they can fill with less liquid). Notice too, he stops when it reaches the cylinder tops, so as not to have the liquid pour into them.

  20. person who knos wat he talks about says:

    its obvious just becoz there smaller doesnt mean they are the same wideness lol it took me a wile until i had a science lesson about optical illusions and this came up.

  21. Ryan says:

    Gogzilla has it, you can barely see the smaller ones but it’s easy on the largest cup. When you pours into it, right before it is full he pours into the center and you can see it splash off. And lastly when he is pouring back into the smallest cup you can see fluid pouring out of a cylinder in the middle of the cup and right before he takes the cup off camera you can see the top of the cylinder.

  22. Anonymous says:

    Damn!
    amazing

  23. piratelover says:

    cheap shot! there’s water in the glasses. when you look at the next to largest, you can see the top of the water! this is no illusion, it’s a dirty trick made to look like an illusion. also, the color keeps getting diluted. if it was the same amount of water the spillage would cause the level to go down. notice how carefully he pours. this is to prevent a splash. cheap!

  24. Mike says:

    I noticed he fills the glasses upward flat and tips them going down. Must be false glass insides or yes water already inside to increase volume when pouring down the line.

  25. piratelover aswell says:

    Yeah this is a gay trick! who ever made this should punch themselves in the face. lol the whot liquid is realy white at start but faded at the end

  26. Anonymous says:

    there is water in the glasses… if you haven’t noticed already the milk gets less cloudy at the end.

  27. Julie says:

    There is water in the cups (color of the white fluid becomes less opaque), the only reason the white fluid hits the bottom is because it is a thicker fluid, therefore giving the illusion that the amount of water increases.
    It’s a neat and clever magic trick.

  28. William Osendott says:

    I did notice the fluid in the bottom of the next to largest one and thought it was water however, notice after he pours the first cup he has to shake the foam on out of the glass. Could be that he’s mixed up a small amount of vinegar/baking soda or something and instead of water in each glass he has a bit more vinegar? Has to have something in there to foam up a bit.

  29. Ellie says:

    Dude thats soooooooooo fake there is water in each glass after the first so it looks like its getting bigger.Just look at how the milk turns into light milkey water plus he just wasted about a pint and a half of milk.Dude you wasted about 3 minutes on a rip off.

  30. Superganj says:

    You can tell that there is water in the cups. The color and consistency changes with every cup. It’s very noticeable with the last cup. It’s still very neat.

  31. Andrew says:

    Simple solution.
    Ther is a closed cylinder in the centre of the glass so the liquid only has to fill up the space around it. The reason it looks more watery each time is that it is a thinner layer of liquid. Obviously you haven’t got daughters or you would have seen something similar in the feeding bottles for dolls.

  32. Paolo Zago says:

    IMO there’s a fake glass in every glass, as Andrew said. I can quite see the cylinder inside the larger one. This explains all the trick but the latest scene. Probably there are actually TWO cylinders inside (one larger, one smaller) or the central cylinder of the larger glass is full of water.
    Also consider that if there were simply water in the glasses you should see the liquid mixing when the milk is poured into…

  33. Op says:

    This isn’t a waste of time; at least, not to me. I get the fact that it’s a cheap trick, but I had fun imagining who DID fall for it:D
    I’m not going to post a solution because too many people have done it already.

  34. Jasmine says:

    Lol why does everyone think it’s so stupid just because they’ve figured it out.

    Hense the word ‘illusion’ GENIUSES

    Or won’t you be happy untill you see real magic?

    Hhahaha.

  35. Satyr says:

    Knew there was something into the quasi-opacity of the glasses. It really is easy to spot the cylinders once you look for them.

  36. rich says:

    they are 1/2 glasses …. turn the glasses and you’ll understand the trick.

  37. Super Mann says:

    AM I THE ONLY ONE WHO NOTICED HIS ZIPPER WAS DOWN?!

    ;)

  38. Terry says:

    ya you can totally see the water line in the 3rd glass he fills and watch how careful he is at not moving the glasses!!!! You can also see the water move in the last glass.

  39. Susana says:

    I think each glass has water, complementing the glass below, just without the white stuff. If you look closely the white stuff gets thinner each time he changes glasses…

  40. Nemanja Curcic says:

    If you look at this video three-four times it is clearly some white liquid mixed with water.If you STILL don’t see it,pause the beginning for 10 sec,look carefully,then switch the end and you will see that the liquid isn’t that much white any more,but more transparent!

  41. Sean Flesch says:

    There are pre-filled cylinders in the center. If you look “through” the glasses while empty, you can see a difference in the way the light is diffracted(is that the right word?) in the center that isn’t consistent with the patterns on the glass on the rest of it.
    You can also see when he’s pouring a few time the top of the cylinder, again probably due to the light going through.

  42. Buraz says:

    u can clearly see another glass filled with water inside of the big one at 1:07 :/

  43. savannah says:

    ok so im just throwing this out there i am probably wrong but if there was a cylinder in the cup wouldn’t it float? i think there was water in the cup cuz the in the end the milk or what ever it was, was a lot less white and there was a change in light in the glass cuz the water!

  44. Matthew says:

    My science teacher had a chemical that could store liquids and comes out when salt is exposed to it. so the liquid or water might have been filled with salt to produce the outcome of additional water in a cup thus creating more water than it seems

  45. Jason says:

    At 0:37, you can clearly see the water already in the glass.

    It would work a lot better if he used segmented glass so the color of the “milk” don’t change.

    Perhaps it’s already segmented since when he pours the water back into the smaller glasses.

  46. decibelz says:

    anyone’s considered maybe he’s ACTUALLY magic?
    just hope you dont tick him off by being skepticle of his magic and make him sick zombies on you with his dread necromancy powers of dreadyness!

  47. Starlet says:

    maybe it’s a fluid that froths as it’s poured, making it able to fill larger glasses???

  48. Jordan says:

    the glasses definitely have water in them, watch closely when he adds milk to the middle glass, it doesn’t flow evenly when the milk is first introduces, instead it forms very briefly a ball of milk before it spreads out

  49. Lyd says:

    looks impressive tho :) even tho evry1 can figure it out… but still :)

  50. Katie says:

    I can see the water… Pretty cool until I saw it.

  51. This is probably the easiest one to replicate.
    1. Take any sizes of a few glasses.
    2. Cut appropriately and place plastic sheets so as to divide the glasses vertically. But only in the bigger glasses.
    The bigger the glasses, the smaller the division should be.
    The camera shows it from a side view, so you don’t know that there isn’t a dividing membrane in the glass. This way, the volume of the liquid need not increase, and it will still appear to fill up the glasses.
    Also, note that the time to fill the bigger glasses is roughly the same time to fill the smaller glasses.
    This proves that the volume must stay constant!

  52. Erlinda says:

    Notice that he doesn’t move the glasses the first time that they are being filled. He carefully pours the “milk” along the sides of the still glasses, progressing until the last glass is filled. The liquid in the last glass to be filled (on the first go around) has a thinner, opaque liquid. With the exception of the very first glass that has the white liquid, all the glasses are half filled with water. That’s why he doesn’t move them as they are being filled. When the largest glass is filled, its volume equals the other glasses combined, so the other glasses can be refilled with the thinner liquid.

  53. cosimos says:

    this is soooooo easy to understand,the glasses get skinner as it goes on

  54. Roger says:

    Well, i think that the glasses might be larger in size but their thickness makes them all have the same volume space inside except the largest one. When he poured the 2nd largest into the largest, one was unable to see the top. The guy must have used another source of liquid to fill it along with the liquid in 2nd largest glass. The largest one is big enough to hold enough liquid to fill all the other glasses.

  55. maria says:

    the fist glass has a divider cutting the glass in half the 2nd glass a little more then half the 3rd littal more so when you pore the liquid to the big one is more bicause the bigger one dont have a divider.

  56. Dead Robots says:

    Yea I think that the glasses already have water in and some kind of whit powder in the first so that he just changing the colour of the glasses…

  57. angreys says:

    another reason why mathematics and physics are wonderful! :)

  58. anon says:

    The glasses are double-walled… the thickness increasing with size.

  59. Hoombakaramba says:

    Ok.. first of all that is a hands of a lady.
    Second she’s using a foam substance to increase the matters inside the glass when interacts with liquid.
    Every glass has a minimal amount of water so that the substance can expand.
    Water is also calculated depending on how the tall glasses are.

  60. Marteyo says:

    Easy, each one isnt really being filled all the way. In the rim is almost a secret area. As the cups get larger, the secret area gets thinner, pushing more liquid to the top.

    Duh.

  61. Nikolaki8 says:

    Easy, there is already water in the each glass at first, that’s why it keeps filling up each time. Also, if you look closely the milk looks faded at the end.

    P.S He’s flys down.

  62. anonymity says:

    well, shit bricks its because there’s water inside.

  63. Logic says:

    it’s easy…look at it….each glass already contains some water in it…..and that’s why in the last glass it’s dilluted

  64. Prince says:

    That Magic is Already Revealed by The Mask Magician. There is a Cylinder Inside Every Glass, Which is Hard to See, Except the Smallest One. So When He Pour Milk From a Smaller Glass to a Bigger One, Most of The Glass Area is Already Occupied by The Cylinder, And That Small Amount of Milk is Enough to Surround The Cylinder And Make an Illusion of a Full Glass.

  65. ted says:

    this liquid looks like sperm

  66. Mark3000 says:

    Watch at 0:43, you can see the liquid hitting the top of the glass cylinder inside the big glass.

  67. nika says:

    how can you explain this : he have enough liquid to fullout one glass at the time , at the end he fullout EVERY glass !

  68. lee says:

    i watched magician’s tricks revealed. it’s quite stupid actually. the trick lies not with the water, but with the cups. the cups are all the SAME SIZE. that means the 1st cup has one layer, the 2nd bigger cup has 2 layers. the first layer is the same size as the 1st cup and the second layer is the size of the cup as people see it. amusing now?

  69. carer says:

    I dont believe its in the glasses as he starts out with a little glass full and by then end has enough to fill all glasses meaning an accumulation of water. So it would, as stated previously be a slowly watered down mix. I like the trick and think it A WORTHY DISSCUS.

  70. just me says:

    Funny, I can see the milk getting lighter and lighter. And, when the milk poured at the end of the first turn, you could see it was clearly almost water. Judging by the size I will say

    cup: 1 is filled with real milk)
    cup: 2 is filled with water that amounts 1/2 of cup 1
    cup: 3 is filled with water that amounts 1/2 cup 2 and so on.

    I will have to say I was confused the first 23 sec.

  71. Arcelia says:

    i agree with the cylinder, its not water

    • Kaitlyn says:

      The tallest glass already had water inside of it. I could see it moving.

    • CoDfan12 says:

      its obviously fake….. you can tell because every time he pours the liquid into the taller glass it turns lighter. that means that the glasses have water in them which mixes with the first liquid (milk?) to make it lighter.

  72. MR.X says:

    They have water in the glasses, as you can see the milk goes a watery colour

    • PS13 says:

      Yup… all the glasses have water in them & you can see the milk gets more ‘clear’ the more he pours. Pretty easy to figure out, IMO.

  73. Dwight Barran says:

    Glasses are interior lined, there’s some kind of material (powder of some sort) in the glasses too.

  74. Adam says:

    alien technology definitely

  75. midurs says:

    thats the best illusion vid ever <3

  76. Yerk says:

    There is a cylinder inside them. when you pour the milk/water/whatever into them it only fills around the cylinder . whenever the glasses get bigger so do the cylinders

  77. Nihilum says:

    It’s likely a combination of baking soda and viniger, which will slowly expand, allowing it to fill bigger containers as it fizzes up. After it is transfered a few times it will go flat, halting the expansion. This is why the largest cup can refil the others. If you watch the vid full-screen you will see the fizz in the first cups, but not the last because it has gone flat by then.

  78. midurs says:

    ok thats cool but kinda ovious :o

  79. Sean says:

    Oh.. that’s milk?
    haha..

  80. raven says:

    its water, you can see it move in the biggest cup

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