Pythagorean Shot Glass

Inspired by the Pythagorean Cup Wikipedia ( http://en.wikipedia.org/wiki/Pythagorean_cup ). I made this trick shot glass. Pour water (or some other liquid) in the top and it works fine. If you pour in too much and it magically drains away, thanks to SCIENCE!

See my video demonstation here: http://youtu.be/Z_eCbkFJUQ0