Designed this Coaster Holder for 4" diameter coasters. The Step file will load as 7 different parts, for easy coloring. Holds 8qty.

If you are interested in the Trail Blazers Coaster, that is found at https://makerworld.com/en/models/19460

If you are wondering about the gap at the top, I used some cork from Amazon on the coasters (not pictured), 2mm thick. https://www.amazon.com/gp/product/B08YVPDB94