We are pretty excited about our coasters. They are individually letterpress printed by our staffer Marty and local company Paper Monkey Press. Along with the colored ink, the letterpress machine imprints a indentation into the coaster, leaving a really nice texture. The coasters themselves are thick paperboard...they won't last you forever but they won't fall apart after supporting a few beverages either. The idea comes from a 1930's monochrome German coffee roaster advertising coaster Tom found. The roaster design hand stamped on the back was originally drawn by our staffer, Mike. Each pack of 4 comes with orange, blue, purple and green coasters. They ship in biodegradable cellophane.