Crafted of stoneware, featuring a reactive glaze. Due to the nature of reactive glaze, each piece of this handcrafted collection will exhibit unique variations in color and pattern. Everyone loves a mug! It's one of our most popular items. This piece is perfect for coffee, cocoa, teas and punches. Also makes a great gift when filled with gourmet coffee, tea or tickets to a concert of play. Microwave and dishwasher safe. Mug holds 12 ounces.