Summary

I saw a video online explaining how this cup worked, and I set myself the challenge of designing one.

The way the cup works is that if it is filled more than necessary, the liquid inside will be completely emptied.

I hope you like it.

(The small cup is printed at 100% size, and the large one at 150%. You can increase its size as much as you want, but if you reduce its size check that the tubes are made correctly)