The Pythagoras Cup: Ancient Physics That Punishes Greed The Pythagoras Cup is one of history’s most ingenious inventions—using pure physics to teach moral discipline. Designed over 2,500 years ago, the cup appears ordinary, but pouring beyond a certain level activates a hidden siphon that drains every drop from the cup. Attributed to Pythagoras, this clever design ensured fairness and moderation, especially among students and workers. It stands as a timeless example of how engineering and ethics