Magic Mugs / Heat Sensitive Mugs

[yellowplanet]

Hi there,

I've seen the magic mugs where we can press an image on, the mug then looks completely black when cold, only revealing your image when a hot drink is poured into it.

But, is there a way of having an image on the mug which changes as you pour the hot liquid in.

An example I've seen which explains what I mean is a Star Wars mug with light sabre handles on, then when the hot liquid is poured in it appears like the light sabres have been switched on.

Is this something that can be achieved simply using a home system or does it have two processes where by the cold image is printed on the mugs first, then coated in a magic solution layer and the hot image printed on top?

Cheers,

Jon