Want to make some jokes to your friends? This is the famous Pithagorean Cup, also called Greedy cup, if you fill it halfway it will be a normal cup, if you fill it to the top it will "magically" empty itself.

NOTE: I uploaded a version with visible canal and one with hidden canal, the printing profile i uploaded is perfect for both of them.

NO SUPPORT NEEDED

You can scale it up as much as you want but you shouldn't scale it down less than 50% or it won't work