This simple coaster can be printed in two or three colors via filament switching.

Print in PLA with 0.2mm layer height.

See my other coaster designs here :

https://www.printables.com/@kaje/collections/567521

CAD

The OnShape 3D CAD files for this are here :

https://cad.onshape.com/documents/333e9edc578b896cc005b8a1/w/749fd575eeccc0f521254337/e/78fd38b96b2d8e6a0f146ed9?renderMode=0&uiState=642ec40096029d63600a4db6