Watch the Marauders Map magically appear in front of your eyes as you add hot water to this awesome Harry Potter mug.
'I solemnly swear that I am up to no good', these were the words that Harry used to make the Marauders map work, and Moony, Wormtail, Padfoot and Prongs before him. It's also what this mug will say until you fill it with your favourite warm drink.
Pour hot liquid inside and watch as the mug's colour changes to a parchment colour, the wording fades away, and the marauders map appears from the darkness along with the signatures of its creators.
A magical mug for muggle fans of the Harry Potter books and films.
