A Pythagorean cup (also known as a Pythagoras cup, greedy cup, cup of justice, anti greedy goblet or Tantalus cup) is a practical joke device in the form of a drinking cup. When it is filled beyond a certain point, a siphoning effect causes the cup to drain its entire contents through the base.
A Pythagorean cup (also known as a Pythagoras cup, greedy cup, cup of justice, anti greedy goblet or Tantalus cup) is a practical joke device in the form of a drinking cup. When it is filled beyond a certain point, a siphoning effect causes the cup to drain its entire contents through the base.
Source: Wikipedia "Pythagorean cup" · CC BY-SA 4.0
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