V2 is available now. As requested, we've lowered the handle (consequently, the siphon), so the draining action should now start at about 2/3 of the cup. In the original file, the mug would have to be almost full before it started draining. Thank you for the feedback!
The famous pythagorean cup has a central siphon that drains out all the liquid if a maximum threshold is crossed. We adapted it into a mug that hides the siphon inside the handle. This version was modeled in FreeCAD, version 0.20. To learn more about the pythagorean cup, visit https://en.wikipedia.org/wiki/Pythagorean_cup
The author marked this model as their own original creation.