Pythagorean Cup - Sneaky/Discreet (Column-free)

First, what is a Pythagorean Cup? In laymen's terms, it's a cup behaves normally until it's filled past a certain level, at which point it drains the entire contents out the bottom through a siphon tube.

For a more detailed explanation on its history and how it works, look at the wikipedia article on it, that provides a good summary.


Second, a Pythagorean Cup normally has a giveaway column in the middle of the cup, which contains the siphon tube. That's where this model is different.