My take on a Pythagoras cup
thingiverse
This is a unique spin on the Pythagoras Cup, commonly known as a Greedy Cup. At first glance, these cups appear similar to regular glasses, but upon closer inspection, you'll notice a hidden channel running along the inside that connects the reservoir to the bottom of the cup. The story behind this clever design varies, but the main idea remains the same: when someone tries to fill it to the brim, the secret channel fills with liquid and triggers a siphon effect, draining the glass in an instant.
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