From Gourmet Basics by Mikasa® Collection. Crafted of Stoneware, featuring a reactive glaze. Due to the nature and hand-crafted qualities of reactive glaze, no two pieces are exactly alike and will exhibit unique variations in color and pattern. Product may slightly differ from image shown. This mug is perfect for sipping your morning coffee or drinking some afternoon tea. Microwave and dishwasher safe. Mug holds 16 ounces.