While it’s a bad idea to give gremlins water, hot water in this mug is definitely approved. This officially licensed Gremlins Morphing Mugs® Heat-Sensitive Mug changes from black to bright nostalgia, featuring Stripe and Gizmo.
The exterior of this officially licensed 11oz mug transforms from black as hot liquid is added, revealing the hidden image in full vivid colors.
While this mug may be used in the dishwasher or microwave, for the longest lasting, highest quality product, we strongly recommend against it.
Morphing Mugs heat-sensitive mugs are 11oz mugs that are black at room temperature, but reveal a vivid, full-color image when hot liquid is added.