I found the idea of WBS great, although I wanted the water condensed on my glass not to drip on my desk. Because no, I don't exclusively drink coffee at work. Sometimes I enjoy a cold beverage(lol). So I made it solid with the engraved molecule.

I printed it in PLA with 20% infill to make sure the hot temperature of my mug doesn't deform the coaster. So far, so good. No deformation issues.