Basic Coaster

This is a basic coaster that uses a honeycomb lattice as the base, with a light bubble pattern around the edge. The usable surface area of the coaster is about 100mm in diameter. I modeled this based on standard coaster dimensions to fit a wide range of cups and mugs. 

Print with any standard profile, no supports needed. You can use the paint tool to customize coloring on the topmost surfaces to add details. Standard PLA works well, but you might consider a higher temperature-resistant material such as PETG if you intend to use it for hot cups and mugs to avoid warping.