Microwave safe 16 oz. Nature Ad (TM) Corn Mug (TM) coffee mug made from 100% U.S. corn plastic (patent pending). Corn plastic is an environmentally friendly alternative plastic that helps relieve U.S. dependency on foreign energy and is based on a renewable U.S. agriculture product. Corn plastic information is included on each mug. 100% corn plastic logo engraved on mug bottom and removable 100% corn decal included. 5" tall. Hand wash to preserve rich luster.