Magic mug requesting a godfather - Cap or not cap to be my super godfather?

Original idea to announce this great news around you, to request a godfather or godmother mug with thermo-magic effect, will be offered to the future godfather, the future godmother, the future grandmother or the future grandfather the mug is black when cold. Pour a hot drink and the message will appear as if by magic Surprise guaranteed! - Ceramic mug with thermo-magic effect - Hand wash recommended - Protect from the sun (not UV resistant) - approx. 300g - Capacity approx. 300ml