Pairs with lid. World Centric® 12 oz NoTree™ bamboo cold cups are made from 100% bamboo paper, meaning no trees were cut down to make them. These cups are unbleached, have a bio-based lining and are certified compostable in a commercial composting facility. The use of bamboo paper in place of traditional paper helps preserve our dwindling forests and the wildlife and indigenous communities that rely on them. Composts in 2 to 4 months in a commercial composting facility. Not microwavable.