Bone China Mug with Decorative Design, 350ml CapacityA mug made in the UK of bone china, microwave safe for heating up beverages. Bone china is white and the strongest and most translucent ceramic, containing at least 35% bone ash, and is tough enough for daily use, usually dishwasher safe. Other types of china include earthenware, stoneware, porcelain, fine china, and new bone china, each with different properties such as durability, heat resistance, and translucency.