Warm up your hands with this charming rustic coffee mug. Part of the Element collection of coordinating mugs, bowls, and serve ware from Danica Heirloom. Material content: stoneware with a reactive glaze. Care instructions: microwave and dishwasher safe. Capacity: 14 oz The nature and beauty of reactive glaze is that each piece is unique. There may be slight variations in color, texture, and finish to each perfectly imperfect item.