The file 'Mug Coaster – Caffeine Molecule 3D Printer Model' is (stl,zip) file type, size is 862.4KB.
This coffee coaster is wide enough to fit most mugs. The indented symbol is the molecular structure of caffeine. I added a groove on the bottom for an o-ring (the groove is sort a dovetail groove slightly modified to help it print well). Since just a pure plastic coaster would likely slide on my desk surface, I added the o-ring to help keep it in place - and it works pretty well!
caffeine_coaster_rev2.stl | 1.3MB | |
No-letters_version_to_customize.zip | 649.5KB |