He who must not be named. Watch as this 11-ounce ceramic Harry Potter Lord Voldemort Morphing Mug comes to life. When you add hot liquid, it magically transforms in seconds from black to a full-color image of Harry Potter's Lord Voldemort and the words "He who shall not be named! Hand wash only. Not safe for dishwasher or microwave. Measures approximately 3 3/4-inches tall x 3 1/8-inches in diameter.