I've had several patrons request a coaster set with specific names or initials inside. Rather than looking up premade versions where most didn't exist, I put together my own files with the limited PrusaSlicer app. I've even used this base to make custom coasters for my family (they loved them btw, matches the living room of their new house perfectly)

Add or cut in any letters or image you want to make your own unique set.
The Holder can hold up to 5 coasters.

Enjoy!
-BLR of the Virginia Dillard-Smith Public Library Maker Lab Team