Is your father the funniest of them all? If he is guilty of filling your house with laughter, this customised magic mug has his name. If he is joking all day, singing or dancing, he will die laughing with this design. We just need your father’s name and you will be able to surprise him with this original gift . It will be super funny when he finds out that it is not a simple black mug. He won’t expect it! Once you warm it up or pour any warm liquid inside of it, the colour will change, and the final design will come to light! Important: The mug is microwave safe. Important: This mug is NOT dishwasher safe. It may lose the black colour of the surface.