A case designed for 8 coasters with the weaponshields of the four different Hogwarts houses.

Embeded in the coasters you have room for a 50x50x3mm square washer to give the coasters weight.

I've used these : https://www.biltema.no/bygg/festeelementer/skiver/firkantskive-m8-50-x-50-mm-varmforsinket-10-stk-2000054852

The coasters are 90x90X6.25mm. there are also insets for rubber feet on the underside of the coasters. Use ordinary rubber stickers used in cupboards and similar.

I've used these: https://www.clasohlson.com/no/Antiskli--og-lyddempende-knott/p/21-2865

I highly recomend using both the washer and the rubber feet, so that the coasters doesn't slide on the table.

Print with standard 0.2mm resolution and 3-4 wall layers, so that the infill pattern won't show in the rounded areas.