Greedy Cup

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A Pythagorean cup is a clever drinking vessel that helps people control their drinking. This type of cup has been credited to Pythagoras of Samos and allows users to fill it with wine or another liquid up to a certain point. If you carefully pour in just the right amount, you can enjoy your drink without any problems. However, if you're too greedy and try to fill the cup beyond its limit, all the liquid will spill out of the bottom, often landing on your lap.