The Pythagorean cup, also known as the Greedy cup, is a fascinating piece of ancient technology. This cup is designed to hold a specific amount of liquid, but it has a unique mechanism that prevents overfilling. Once the liquid reaches a certain point, a hole in the bottom of the cup releases the liquid, causing it to spill out. Over the years, this cup has been given many different names, including the Tantalus cup, the Cup of Justice, and the Philosopher's Cup. Regardless of what it's called, the Pythagorean cup remains a testament to the ingenuity of ancient civilizations and their ability to apply scientific principles to everyday objects.