This is a modern interpretation of
pythagoras cup. The self emptying cup. With the help of 3D printers, it is now possible to place the tube in the wall of cup instead of a tower in the middle.
Magic? No, just physics. The tube inside the body creates a
siphon. This siphon will empty the cup when it is overfilled.
Some more background information
https://www.youtube.com/watch?v=ISfIT3B4y6E
https://en.wikipedia.org/wiki/Pythagorean_cup
Credits
Picture 5: By © Nevit Dilmen, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=18403793
FuzzyRaptor
