Sometimes a warm cup of coffee or tea works just as well as a ball of magic smoke! This mug captures the illusion of the ball's changing color with heat-reactive ink, turning the inside bright red when you add a hot beverage. Holds 12 oz of your favorite drink. Designed in-house just for Accio! Box, so you won't find it elsewhere!
**To preserve the heat-reactive design, please hand-wash and avoid microwave use.**