A functional and durable coaster that can handle the heaviest of beverages. An oversized water trap handles excessive condensation.

There are 3 variants:

Coaster 2 - This was the first successful design. It's a bit too tall for my taste, but you might like the chunkier look. Print with the top facing up.

Coaster 3 - Redesign of coaster #2 with a thinner, invertible design (can be printed from top or bottom). Upside down looks neat if you have a glass/PEI bed, you'll get a shiny surface.

Coaster 4 - Same as coaster 3 but scaled up ~15%. Large enough to comfortably hold a Nalgene bottle.

Note: You really need to make sure that your first few solid layers are fully infilled, otherwise you will get leaks if water is left in the coaster for too long (this sometimes happens with oversized, very cold glasses). See print setting notes below for more info. Or, you could finish it with paint, sealant, or lacquer. I've also considered putting absorbent/wicking material in the cavities to prevent the water ingress into the plastic.