Devious Pythagorean Cup - Hidden Siphon 3D Printed

A real thing, made fresh for you when you order.

37k downloads in the maker community

$23.87

Color: Gray

Printed in the USA when you order.

1.You order it
2.We print it fresh
3.It ships to you

Self-draining cup with completely hidden siphon mechanism—no visible stem to spoil the surprise
Functional physics demonstration: holds liquid when partially filled, drains when overfilled
Perfect STEM learning tool and brain teaser for students and curious minds
Tested and proven to work—siphon tube concealed within the rim for maximum deviousness

The Pythagorean cup is a classic drinking vessel that demonstrates fluid physics and the principle of siphon action. Fill it partially and drink normally. Overfill it and the entire contents drain—traditionally used as a historical lesson on the dangers of gluttony and excess.

This devious version improves on the original design by concealing the siphon tube within the cup walls rather than using an obvious central stem. The hidden tube traverses over 300 degrees around the rim, so a moderately filled cup won't drain when tilted. It's been printed and tested to work perfectly.

Ideal for science classrooms, physics demonstrations, or anyone who enjoys a clever engineering prank. Great conversation starter and hands-on introduction to fluid mechanics.