Solemnly swear you are up to no good with this Harry Potter Marauder's Map Heat Reveal coffee mug!
It's Magical! The mug features a solid exterior that reveals the image when a hot beverage is added.
Heat reveal works with coffee, hot chocolate, or any warm beverage (including hot Butterbeer) -- No wand necessary!
A perfect gift for any muggle who's a fan of the Harry Potter book series or movie franchise!
Officially Licensed Harry Potter product. Ceramic. Hand wash recommended.