Batman Logo Evolution 20 oz. Ceramic Mug:Awww, the little tyke is all grown up! With this Batman Logo Evolution 20 oz. Ceramic Mug, you can watch how the logo from DC Comics'Batmanseries has changed and matured throughout the years. Made from ceramic and holds up to 20 ounces of liquid. Hand wash only. Not dishwasher safe. Do not microwave. Ages 13 and up.