Designed for a family member to utilise the bottle caps he kept from his trip to Belgium. The design allows the user to just push there bottle caps onto the coaster to create a platform for a glass to sit on. Recesses in the bottom allow the user to attach self adhesive rubber feet for extra grip. Print straight to the print bed for both SLA and FDM. Sorry, you will have to supply your own bottle tops ;) Great for a unique gift / present!