This is a remix of NilsDougan's very cool coaster laser cutting patterns (thing:2821011) adapted to work with FDM printers.
The STL is scaled to 4in (101.6mm) sq by 2mm thick.
0.2mm
50% infill
Avoid standard PLA if using with hot drinks. HTPLA, PETG, ABS, ASA, PC would all work well.
The author remixed this model.