This provides a customizable drinking coaster that can be Lego® compatible. If Lego® compatibility is what you're after, you may need to tweak the nubbin_diam parameter under advanced.
Be advised that 3D prints aren't necessarily water-tight, even if they look as they might be.
STL files for 60, 80, and 100mm diameters are provided for your convenience.
I hope you will find the design useful!
coaster_lego.scad | 1.2KB | |
coaster_lego_100mm.stl | 633.5KB | |
coaster_lego_60.stl | 210.4KB | |
coaster_lego_80mm.stl | 410.4KB |