ON / OFF – Heat Colour Changing Mug

This simple, clever mug automatically indicates its current state of mind when you pour a hot beverage into it. In its dormant state, the mug offers a black “OFF” display, but once your hot coffee or tea hits the inside, it gradually transforms to read “ON”. A heat sensitive pigment changes the color of the mug from black to white.
•Don’t expose under the sunshine for a long time
•Don’t scrape on the printing with sharp & hard tools
•Wash with hand, not suitable for Dishwasher machine and Heat-disinfection machine
•Magic Printing will appear once you put the liquid over 70`C