This Towle Living Copper Plated Plain Mug features a sleek, simple design and is ideal for enjoying cool, refreshing drinks year round. The exterior is copper-plated while the interior is constructed of food-safe 18/10 stainless steel. Hand wash with gentle detergent and soft cloth; dry immediately. Do not soak. Mug measures 3-1/2 inch diameter x 3-1/2 inch high and holds 18 ounces.