Beer Mat Coaster

3D printed coasters are great, but the problem with them is that they don't soak up any of the condensation that you get with ice cold drinks. Beer mats do soak up condensation and spills, but don't look too sophisticated when they are used in the house.
So this is a compromise, where the beer mat is securely housed in a "stylish" 3D printed enclosure that has corner grips and an opening at the back to facilitate easy removal when changing the mat. Hopefully they'll make your house look less like the public bar at the Dog and Duck, and you can choose filament colours to match the beer mat and/or decor of the room.

There are two versions:
One is plain and the other has a slightly raised stripe to make it easy to add a second colour.