I made these Make Anything coasters for a few of my Patrons a while back and figured I should share the file! Swap the filament at 3mm z height to get the dual colors.

For the crazy one shown as default, I had a triangular infill, set bottom layers to 0, top layers to 2, swapped filament at 3, and stopped the print after a few layers. This somewhat accidental series of events produces such a model where the logo and ring have a solid top surface while the infill is still visible from both sides.