They say "keep your friends close and your enemies closer", and you can do just that with this stylish Voldemort Heat Change Mug. With a design featuring The Dark Lord himself and the phrase "He Who Must Not Be Named" on a black background when cold, this much changes as soon as it gets warm. Pour in your favourite hot beverage and watch as the black fades away to reveal the name "Voldermort" that is so feared by wizards around the globe. This stylish mug is perfect for your next tea-break and makes a wonderful gift for Harry Potter fans. First published in 1997, J.K. Rowling's bestselling series of novels following the magical adventures of Harry Potter, Ron Weasley and Hermione Granger has since become a cultural phenomenon. A huge success in novel form, the world of witchcraft and wizardry was then given big screen treatment in 2001, launching one of the most successful blockbuster film franchises in cinema history. Harry Potter is instantly recognisable to millions of people across the world, and is hugely popular among fans of all ages. The Voldermort Heat Change Mug is an officially licensed Harry Potter product.