Thermal Color Change Cup Valentine's Day Romantic Couple Water Cup Gift Product details:Still worried about Valentine's Day gifts? This color changing cup is mysterious and romantic. It will bring happiness to your partner.1. These color changing cups are thermochromic. This means that the color change function is activated by the temperature of any hot beverage you pour into it. several years of use, this effect is still effective. Any liquid above 133 degrees (45 degrees Celsius) will activate the cup and display the mark.2. When the hot liquid is added to the cup, the thermochromic ink becomes transparent, and the printed displayed is clear and bright.3. As the cup cools, the thermochromic coating returns to its color. Note that the is partially visible when it is cold.4. These ceramic cups are sturdy and. Every product we ship is sturdy and with value in mind.5. Due to the special nature of the heat-sensitive coating, the cup is not dishwasher safe and should not be cleaned with harsh abrasives. We recommend washing hands with mild detergent at moderate temperatures.6. Great gift ideas.7. Enjoy delicious coffee anytime, anywhere-not just for Valentine's Day, our coffee cups are your fond memories. It can also be used as a Christmas or birthday gift. to the sturdy handle, the cup is particularly easy to hold.Feature: 1. Size: 8x8x9.5cm 2. Capacity: 350MLPacking list:1 x cup