At plain sight it is a standard black mug as they come a dime a dozen and in big white letters it say COLD (or OFF). Nothing fancy, but once you add the hot beverage of your choice, the mug changes color and is turning white and in big black letters it states: HOT (or ON).

Nifty eh? Do we need to explain more? Nah, we didn't think so, we'll just leave it to the wonders of heat sensitive pigment Dishwasher safe of course!

There are two different style you can choose:

Hot and Cold Mug	On and Off Mug

See the Progress from Off to On

• A funky heat-sensitive mug.
• When the mug is empty or filled with a cold drink, the mug is black with a large 'OFF' (or 'COLD') emblazoned on it.
• When the mug is filled with a hot brew, the mug becomes white with a large 'ON' (or 'HOT') emblazoned on it.
• This product is not dishwasher safe. Handwash only.
• Suitable for ages 12 years+.