PLEASE READ SUMMARY!

This is a greedy cup: a cup, which if filled past a certain limit, will drain it's contents.
for this specific cup, said limit is around the top of the tube in the center of the cup.

the idea for the greedy cup comes from famous philosopher and mathematician Pythagoras.

I have printed this cup myself, and can guarantee it works when printed at 6 inches tall.
It may or not be safe to drink from depending on the plastic use to make it.