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 morning coffee, afternoon tea, or cocoa by the fire, but it's also great for juice, milk or tangy soup. Microwave and dishwasher safe. Mug holds 13 ounces.