This magical mug is coloured black and made in the shape of a witch’s cauldron, making it the perfect accessory to drink your favourite potion out of! The green painted-on drips of potion give this cauldron the perfect Halloween look. This cool mug is decorated with white and golden letters that read ‘Polyjuice Potion’ and the shield of the four houses of Harry Potter, making this wonderful mug a cracking addition to an existing Harry Potter collection. This fantastic mug measures H9cm x W13.5cm including the handle and comes packaged in a decorative card box. © Please do not copy text. Avena product description – Polyjuice Potion Harry Potter Cauldron Mug.