Do you solemnly swear that you're up to no good? This wonderful Harry Potter glasses case is styled after the iconic Marauder's Map that Harry Potter discovered in the Prisoner of Azkaban, complete with details such as the names of the original holders of the map as well as design elements that fans will recognise from the map's appearance in the beloved Harry Potter films. The case even opens like the map, using a magnetic clasp and includes a lens cloth inside, mischief managed!