This heat-activated Custom Magic Mug has a shiny black finish when the mug is cold but reveals your custom designs when in touch with hot liquids. Surprise your loved ones or colleagues with a fun magic mug or start selling the mugs online!
> Height 3.54″ (8.9 cm)
> Diameter 3.35″ (8.5 cm)
>Black glossy finish when cold
>Reveals the print when exposed to hot liquids
>NOT dishwasher or microwave safe
Note that in some cases the coating might not be 100% opaque and the outline of your design might peek through a little.