3x Drink Coasters in the STL and 3mf, along with the STL for the holder.

Coaster holder fits 6 coasters and they sit flush with the top, easy access cutouts at the sides to lift coasters out

Coasters printed with 6x perimeters, 4 bottom shells and 0 top shells.

Experiment with your own infill and percentage for different designs (pictured is honeycomb infill at 20% from Prusa Slicer)