(I tried to post with a tick mark on “Remix” but the website would not let me include the link, so included here);
Credit to [https://www.thingiverse.com/thing:3027141] for the design. Then I found a coaster holder [https://www.thingiverse.com/thing:1724523] and resized it to fit.
My favorite is the circular “target”. Here’s a tip, the center piece is held on by a single “pixel” of filament. So before touching it put a drop of Bondic (www.NotAglue.com) under and harden it. You won’t see it and the piece stays strong.
Before you print the coaster holder, check the size in your favorite design app. Both for internal diameter to hold the coasters, and most certainly for the height. The original design is for ten coasters, but you may want to make it taller or shorter.
I originally posted on the other website, but Printables.com is FAR better.
https://www.printables.com/model/230353-prusa-infill-coasters-with-holder
The author hasn't provided the model origin yet.