HOW TO ACTIVATE COLOR CHANGE - In order to activate cup the temperature of the hot liquid should be over 70°C/158°F5. At that temperature, it is possible for the color of the mug to change.
KEEPS TRACK OF COFFEE TEMPERATURE - Don’t you hate it when you take a sip of your morning coffee and it’s cold? Well with this cup you don’t have to go through this unpleasant experience anymore. As your coffee cools off, your mug turns black!
WARNING - Do not put them in the microwave and do not wash with dishwasher.
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Note: Due to very high demand, please allow 3-4 weeks for delivery.