Mischief Managed and I Solemnly Swear That I Am Up To No Good Harry Potter Mug for Wizards by BeeGeeTees (11 oz) Made of white ceramic and contains no lead! Two different images printed on opposite sides with a high gloss finish. One mug - available in 11 oz. and 15 oz. Dishwasher & Microwave Safe! High Quality Mug - Individually Boxed!! Printed and Tested in the USA.