BUYDEEM Ceramic Mug, Dark GreyHigh quality Glaze The premium ceramic mug is designed for everyday use, the matte glaze is nonporous, non reactive, and resistant to chips, scratches, and stains. Extra Flat bottom The 5'' bottom size is designed for all cup warmer, the flat bottom design warms your coffee more efficiently. Ergonomic Handles Comfortable wide loop side non slip handles provide a sure grip, so your hand stays cool and comfortable while drinking your hot drink.