Harry Potter Universal Studios - Marauder's Map Heat Reactive Mug

This is the ceramic Harry Potter ‘Universal Studios - Marauder's Map Heat Reactive Mug’. “Heat-activated footprints circle this black ceramic mug, from the words '”The Wizarding World of Harry Potter Universal Orlando” on one side, to the Marauder's Map decal on the other. The footprints appear when a hot beverage is added to the mug. Formed handle provides comfortable grip.” “5" H x 3 1/2" Diameter 20 oz. capacity” This is in great used condition, though there’s a tiny mark/scratch on it (as shown in the 4th photo).