Coaster with the Yggdrasil tree of life.
It is recommended to print it at 0.2mm layer height and change filament at layer 12.
The coasters were superglued carefully around the edge of some glass coasters that we already had, and self adhesive rubber feet added to the underside.
Since the thickness and number of your glass coasters and rubber feet may be different, it might be prudent to measure the height of the finished stack of coasters before deciding whether height of the coaster holder needs to be adjusted.
The author remixed this model.