Magic mugs make a terrific surprise gift. At first glance just an ordinary black ceramic mug, but thanks to special thermal coating a picture appears on them when you fill them with hot liquid. Please note that, due to the way these color changing mugs turn white when heated, white text and designs won’t be visible on them and thus can’t be printed. Special care should be used when washing them and you should under no circumstances place them directly from cold water immediately into boiling water, or the mug may crack.