“I solemnly swear that I am up to no good.” Just recite the phrase and tap your wand to learn the location of every inch of Hogwarts. Here, we offer a slightly different brand of magic. The exterior of this Morphing Mugs heat-sensitive, color changing mug transforms from black as hot liquid is added to reveal a full color image of the Marauder’s Map, along with the two magic phrases made for its use. Whatever you’re up to, this mug (and your morning coffee) will help insure that your mischief stays 100% managed.

Product Features

• Excellent stocking stuffer idea, transformers from black when cold to reveal the Marauders Map when hot liquid is added
• Color changing, official Harry Potter heat sensitive ceramic mug
• Heat activation reveals hidden image
• 11 ounce in size, comes in Harry Potter branded packaging
• Officially licensed mug designed and printed in the USA by Trend Setters Ltd. Authentic Morphing Mugs heat sensitive mug