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. When the occasion calls for a hot beverage, this mug is the perfect accompaniment to your beverage. Perfect for hot tea, coffee, mulled cider or hot chocolate, but also great for cold beverages. Microwave and dishwasher safe. Set of 4 mugs, each measures 4 inch high and holds 12 ounces.