This is a rebuild of my previous Condensate Trap Coaster http://www.thingiverse.com/thing:1159194 but with bigger pins, spaced out more, and a deeper well. This holds about 50% more condensate than the V4. From the previous release:
Cold drinks in warm/humid environments tend to get a lot of condensation on the outside of the glass.
This coaster traps the puddle of water under the glass.
Made it in Sketchup, model included. The pins are a component arrayed along a spiral, so you can fiddle with the pin details (size, shape, etc) and the spacing along the spiral, as well as the spiral details.
I've also included a template for sticking feet to the bottom of the coaster to allow them to stack and keep them off the surface. Any 1/2" rubber foot should work, but I use:
I printed these initial ones in the new Z-HIPS colors, but will probably do a bunch in Z-Ultrat
Peel off the raft, use the template to stick the feet on the bottom