Warner Brothers has recently released a new, adorable mug, quoting the Marauder's map! The cup, which starts off black and says "I solemnly swear that I am up to no good," changes to white with the phrase "Mischief Managed" after you pour something hot into it! You can find it at their Harry Potter shop here for $19.95 USD. You can also view a picture of it below and here in our gallery!



Thanks to UHP for e-mailing!