It's a boy Baby or it's Sex Reveal Black Magic wow Mugs
 
Wow is the word! These mugs are black when cold and once hot water is poured into them the black vanishes revealling the photos and or words on a white mug. Once cold the white mug goes back to black. A great gift idea for Mothers Day, Birthdays etc and great for use when revealing the sex of a baby 
 
Dye Sublimation printing is a process whereby full colour images, text and other graphics can be transferred onto a receptive item. The process relies on a specialised ‘dye sublimation’ ink, which when heated changes from being a solid dye to being a gas, without passing through a liquid stage. Taking this a step further, if this gas encounters polymer fibres as it moves, it will penetrate those fibres, permanently dyeing them. 
 
The effect is rather like that of tattooing. The surface of the substrate is smooth and the transfer print cannot be felt (unlike with a screen print), instead becoming part of the surface. This provides a totally durable result that will not fade or crack.