This is a coaster that was designed to slide on the arm of the couch. The inner dimensions are about 7 inches. Drink base diameter is about 3 inches.

Instructions: Print on the end with the indent hole down. The indent is very small but is only on the center area of one side. It should be printed with this side down as the chamfer edges are optimized for printing in this orientation. A brim isn't needed but if your filament experiences warpage then you might want to use one anyways.