WHAT’S IN THE BOX: four large 18.5 OZ mugs in assorted colors CARE INSTRUCTIONS: sleek mugs that are also dishwasher and microwave safe STONEWARE/DOUBLE REACTIVE GLAZE: reactive refers to a technique how multiple colors within the glaze react together to create a dreamlike, vibrant quality to the colors and hues. Due to the reactive nature of the glaze, each stoneware piece is unique. The high firing temperature, thick build, and mix of all-natural clays, makes stoneware an incredibly durable material MODERN DESIGN: artisanal reactive glaze featuring natural organic hues creating a modern elegance to the mug set. The large shape makes this mug set suitable for all drinks