This 11 oz. ceramic mug is constructed of gloss finish stoneware and eco-friendly bamboo. The bamboo coaster is attached to the mug with a silicone band and is easily removed with a twist. Hand washing recommended. FDA compliant. Microwave safe. Sold and shipped in full carton quantities of 36 per color. Additional imprint area is 3/8" H x 1 1/2" W on coaster (laser engraved)