[Album](https://imgur.com/a/oUjwwjU)
The salient bits from wikipedia
> A Pythagorean cup is a practical joke device in a form of a drinking cup, credited to Pythagoras of Samos and looks like a normal drinking cup, except that the bowl has a central column in it.
>
> When the cup is filled, liquid rises through the second pipe up to the chamber at the top of the central column, following Pascal's principle of communicating vessels. As long as the level of the liquid does not rise beyond the level of the chamber, the cup functions as normal.
>
> If the level rises further, however, the liquid spills through the chamber into the first pipe and out of the bottom. Gravity then creates a siphon through the central column, causing the entire contents of the cup to be emptied through the hole at the bottom of the stem.
Wiki has toilet subsection
https://en.wikipedia.org/wiki/Pythagorean_cup#Toilets
>Most modern flush toilets operate on the same principle: when the water level in the bowl rises high enough, a siphon is created, emptying the bowl.
Video:@SteveMould
Siphon sucks water from lower level up to a higher level, like you see in Steve's video.
There's no siphon in European toilets, there's just a slight bend to keep a water plug in the pipe. The purpose is to keep the sewage smells from coming back up.
It's similar to piping under your kitchen sink, this https://i.imgur.com/4Xb98ER.jpeg has no siphon effect.
Every part of me is trying not to say "in ancient Greek!" But yeah these guys were fascinating, at least in America we associate Pythagoras with math. But the guy seems like a bro when you read about him. A show off, maybe kind of an ass. I want to know what an ancient Greek roasting among buddies was like. Was there a chorus? Did guys like Pythagoras travel with an entourage?
Did you watch the video? The second example with cut-away view? Where's the hole... on the side. You're right it could spill through if tipped to the correct side but that's easily resolved by putting on same side as a handle.
I dont know if the mathematician was thinking about the specifics of how it might look on your coffee table, give or take, 2300 years later when proving the principle though design.
They are are sold as close the the original designs as possible for this historical reason.
Not saying it’s bad! I would still take the dingus cup. I’m just thinking in modern society it might be easier to fool someone if it was in like a mug handle or something.
Wouldnt be a pythagorean cup then. ;-)
There are similar joke cups that you simply hold your finger over a hidden hole (like a puzzle jug).
[https://en.wikipedia.org/wiki/Pythagorean\_cup](https://en.wikipedia.org/wiki/Pythagorean_cup)
There's a cross section so you can see how it works.
Did Pythagoras specify that for a cup to be his the siphoning element must be built into a center column? Seems like if the principle is the same, building the siphon into the mug handle would absolutely still be a pythagorean cup.
He would have, yes. Otherwise that's not how the math behind the pressure and surface tension would work. If you put it all into the stem it would just drain straight through and out the bottom right away.
You could possibly build it into a very thick rimmed cup instead, but that might also look a bit weirder, and hiding the overhang/drainage hole might be more challanging. Especially from pottery designs/ability from the time.
I'm sure you could hide one into the handle on a modern plastic mug though. As the handle has the right height for it. You'd just see the hole if you looked in.
You see how the hole at the bottom of the main chamber in the 2D version is *right* at the very bottom? If it entered the siphon higher up somewhere on the left-hand side, you'd be left a pool of water at the bottom
It does. Your toilet just immediately refills the bowl so it appears the water doesnt fully drain. Any water that is not already in the bowl once it overflows will not flush.
This principle is used by the Roman’s to transport water up a hill. Only thing you need to do is build the receiving end a little lower then the giving side.
Steve Mould is amazing. He then used the 2D version of the pythagoras cup to make some sort of analog computer that does binary computation with water and it was crazy as fuuuuuck
At first I was like "so fucking what, it's a cup with a hole in it," and then I realized it was a cup with a FANCY hole in it, which changed everything
[Album](https://imgur.com/a/oUjwwjU) The salient bits from wikipedia > A Pythagorean cup is a practical joke device in a form of a drinking cup, credited to Pythagoras of Samos and looks like a normal drinking cup, except that the bowl has a central column in it. > > When the cup is filled, liquid rises through the second pipe up to the chamber at the top of the central column, following Pascal's principle of communicating vessels. As long as the level of the liquid does not rise beyond the level of the chamber, the cup functions as normal. > > If the level rises further, however, the liquid spills through the chamber into the first pipe and out of the bottom. Gravity then creates a siphon through the central column, causing the entire contents of the cup to be emptied through the hole at the bottom of the stem. Wiki has toilet subsection https://en.wikipedia.org/wiki/Pythagorean_cup#Toilets >Most modern flush toilets operate on the same principle: when the water level in the bowl rises high enough, a siphon is created, emptying the bowl. Video:@SteveMould
American toilets use this type of siphon. European ones use gravity, no siphon there.
What do you mean by no siphon, the s bend always acts as one no matter how tall or short
Siphon sucks water from lower level up to a higher level, like you see in Steve's video. There's no siphon in European toilets, there's just a slight bend to keep a water plug in the pipe. The purpose is to keep the sewage smells from coming back up. It's similar to piping under your kitchen sink, this https://i.imgur.com/4Xb98ER.jpeg has no siphon effect.
The syphon is in the cistern tank on a lot of older style european toilets. Newer models not so often
Hark! Looketh upon thy loins for thou hast spilleth thine beverage upon thyself!
“Demetrius, thoust hath soiled thine own tunic!”
I heard this with a lisp.
Pray, might thou ligma balls, fellow? I have obtained thee in thy shame
I always wanted to know how they talked in Ancient Greece
Every part of me is trying not to say "in ancient Greek!" But yeah these guys were fascinating, at least in America we associate Pythagoras with math. But the guy seems like a bro when you read about him. A show off, maybe kind of an ass. I want to know what an ancient Greek roasting among buddies was like. Was there a chorus? Did guys like Pythagoras travel with an entourage?
I have a vewy gweat fwiend in Wome called Biggus Dickus
Does it have to be in the middle like that? Or can it be built into the side so it just looks more like a thick cup and not a dingus cup?
If you put it in one side you might trigger it by just tipping the cup to the wrong direction. If it is in the middle it will not happen by accident..
Finally a real answer. Thank you
Did you watch the video? The second example with cut-away view? Where's the hole... on the side. You're right it could spill through if tipped to the correct side but that's easily resolved by putting on same side as a handle.
Are you trying to tell me I cannot drink from the side where the handle is, because i have just proven you wrong!
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No, it's exactly like the 2D model.
I dont know if the mathematician was thinking about the specifics of how it might look on your coffee table, give or take, 2300 years later when proving the principle though design. They are are sold as close the the original designs as possible for this historical reason.
Not saying it’s bad! I would still take the dingus cup. I’m just thinking in modern society it might be easier to fool someone if it was in like a mug handle or something.
Wouldnt be a pythagorean cup then. ;-) There are similar joke cups that you simply hold your finger over a hidden hole (like a puzzle jug). [https://en.wikipedia.org/wiki/Pythagorean\_cup](https://en.wikipedia.org/wiki/Pythagorean_cup) There's a cross section so you can see how it works.
Did Pythagoras specify that for a cup to be his the siphoning element must be built into a center column? Seems like if the principle is the same, building the siphon into the mug handle would absolutely still be a pythagorean cup.
He would have, yes. Otherwise that's not how the math behind the pressure and surface tension would work. If you put it all into the stem it would just drain straight through and out the bottom right away. You could possibly build it into a very thick rimmed cup instead, but that might also look a bit weirder, and hiding the overhang/drainage hole might be more challanging. Especially from pottery designs/ability from the time. I'm sure you could hide one into the handle on a modern plastic mug though. As the handle has the right height for it. You'd just see the hole if you looked in.
You can, but I suspect it was easier to make that way with the pottery skills of the time.
I imagine you could build a mug with the siphon in the handle, with the added benefit of spilling it on the user's arm rather than on the table.
This is the way
Fun fact. This technique is being used in toilet
The moment I heard “I made a 2d version” I knew it was Steve Mould
I’ll just drink from the bottom of the cup. Problem solved.
Did you just invent the wine-bong?
And this is how toilets work
they don't empty all the water though
Neither does the cup, there will always be a small amount of liquid left in the container.
In the flat/transparent view, all the liquid is drained
[Does that look like there’s no liquid left inside?](https://i.imgur.com/hMZQgm2.jpg)
You see how the hole at the bottom of the main chamber in the 2D version is *right* at the very bottom? If it entered the siphon higher up somewhere on the left-hand side, you'd be left a pool of water at the bottom
It does. Your toilet just immediately refills the bowl so it appears the water doesnt fully drain. Any water that is not already in the bowl once it overflows will not flush.
This principle is used by the Roman’s to transport water up a hill. Only thing you need to do is build the receiving end a little lower then the giving side.
Yeah, to get water up a hill you just need to start with it higher than the hill.
Steve Mould is amazing. He then used the 2D version of the pythagoras cup to make some sort of analog computer that does binary computation with water and it was crazy as fuuuuuck
At first I was like "so fucking what, it's a cup with a hole in it," and then I realized it was a cup with a FANCY hole in it, which changed everything
Love your explanation
There is one of those in everyone's bathroom.
Or be greedy then put your mouth underneath.
What am I watching?
This is like the millionth time this cup is being mentioned here
Me when I just pour myself another glass
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Bizarre, like an AI comment or something
Much wants more and loses all.
isnt that how they shotgunned wine back in the day? to make sure it is full before commencing
Math flashbacks kicking in.
I ~~like~~ hate it! Another!
This is how my bong works
Our math teacher showed us this like 7 years ago
Toilet cup
dumb way to throw out good $hit. Better let others drink it if you don't want to
Whythagoras?
Works like a Stabil bottle.
Some other guy had a much better way of showing how it works. Instead of making the model, he just cut the cup in half.
This is the first time I’ve actually seen a physical cup like this. Every time I’ve seen this concept, it’s been a cgi render
Now this but for money
Hey that’s how we get rid of poop too
Oh... So this is how a flush works huh
I dont need a cup that pees. I can do that myself
why isnt that a toilet flushing technique without rubber seals
The ceramic glaze is a bit crumbly but pretty
Close the bottom it becomes Pythagoras bottle
Oh look a toilet
Why
Soxhlet Extraction
Same principle toilets are designed under.
Greedy >:(
As Will Smith said in ID4: "I have got to get me one of THESE!" Actually a few, for gag gifts.
This is something my bro needs
This is how the dispenser on your front load washing machine works
Capillary action … in action
Lo’ and behold! A toilet.
The science works with poops, too!
I swear all my whiskey tumblers have this because none of them stay full.
I forgot about these! How cool