Batman Logo 18 oz. Ceramic Oval Mug The Caped Crusader graces the cover of this great mug! This Batman Logo 18 oz. Ceramic Oval Mug is black overall, and features the Bat-symbol on one side of the mug, with the Batman logo on the other side. Ceramic oval mug holds up to 18 ounces of liquid. Hand wash only. Not dishwasher safe. Do not microwave.