HARRY POTTER Mini Cauldron Mug - The Leaky. Officially licensed merchandise. This Harry Potter mug is an absolute must-have for every fan of the world of witchcraft and wizardry. This magical Harry Potter shaped mini mug resembles the cauldrons used in Potions lessons at Hogwarts School of Witchcraft and Wizardry. The mould has been hand sculpted to get the perfect round shape and detailed handles. This mini mug features the name of London's oldest pub, The Leaky Cauldron, surrounded by stars on the front and the name of the street it is located on, Diagon Alley, in a scroll on the back, all in embossed gold metallic detailing. A perfect gift for a true Harry Potter fan.