As I always had issues with glasses slipping from 3d printed coasters, I've designed a simple solution: the circles around the cat draw are higher than the rest of the coaster, so it keeps the glass from moving out of the coaster
big coaster, 106mm diameter, but you can scale it up more if you have even bigger glasses. (tested with the biggest I had :) )
Use layer height 0.2mm (also for the first layer) and change colors at layers 11 and 14.
Florin
