Pythagoras cup, Greedy Cup, Cup of Justice, Tantalus cup or i koupa tis dikaiosynis Fair Cup 7.5CM

This is a great and very unusual gift. It is not just a gag gift or drippy cup, but a beautifully made cup that can be used in everyday life. Now, just because it is an excellent example of a Pythagorean theorem is an added bonus. Buy this cup both for its beauty and its uniqueness.

Absolutely loved the cups!!! Delivered early. Quality and the colors were awesome. Couldn’t be more pleased.

Very cool and well crafted. Works great and is a fun gift for plumbers or mathematicians alike.

Arrived quickly and in great condition. Cups worked as expected. The artwork on these is also very nice. It is a good conversation piece but may not be particularly useful for casual use as it is intended to displace its contents. Even to demo it, you have to carry something to catch the liquid.
However, this cup is a tribute to this great scientist-inventor-philosopher who is currently known only as the "Square-of-the-hypotenuse" guy. Pythogaurus is supposed to have urged moderation in eating meat and suggested not to get carried away by religious dictates. He influenced Aristotle who in turn would play a major role for both Socrates and Plato. This cup, according to the story, is about reinforcing fairness: His students, after doing their daily fieldwork, would rush back to drink wine and the first ones to arrive would drink more than their fair share leaving none for the later arrivals. Pythogaurus designed this cup so that an automatic siphon is created if the cup is overfilled, and all the contents get drained out.