**Ask a monkey a physics question thread**

[Savy]

If you're out using someone else's cups and glasses, or don't want to replace the cups and glasses you already have, then change the geometry of the coaster. Try to break the plane where your glass meets the coaster.
Maybe put a toothpick under one side of the glass, so it sits unevenly. Maybe put 2 coasters with a small gap in between them and put your drink over the gap. I haven't tried it so do the science on this and report back.
It's prob not expensive to find a coaster set which has indents on the surface which solve this problem.

This is fucking genius and what I wanted, thanks. I mean the toothpick bit isn't that's going to result in split drinks the two coasters however is.