About the Harry Potter Hogwarts magic mug .
- Because of its heat-sensitive coating, which reacts to the heat, the mug changes its color from black to white .
- When the Harry Potter Hogwarts magic mug is cold it is black and the image is slightly noticeable. But when filling it with hot drinks – tea, coffee, milk or water, its color becomes lighter and the printed image gradually appears.
- The mug is a delightful, original and impressive gift for your family or colleagues.
- Artwork is slightly visible when cold