simple coaster

Hello everyone,As a first simple model, I have a simple coaster with rounded edges for standard coffee cups with an outer diameter of 80mm. Additionally, there is a 5mm tolerance in the inner dimensions of the coaster. I would like feedback and will of course expand and improve the model. White PLA from https://www.recyclingfabrik.com/ was used as the filament. Of course, any other should work just as well. Thank you very much.Boost Me