1、The color of this flower‑patterned cup changes when the cup reaches the required temperature. 2、Use non‑toxic, heat‑sensitive materials, printed on the cup body, feel free to use. 3、Cold change requires ice water to change color. The lower the water temperature, the more intense the discoloration effect. The longer the color change time, ice water below 18 degrees is the best. 4、Cold change cup: Cold change requires ice water to change color, hot water at room temperature cannot change color. The lower the water temperature, the stronger the discoloration effect and the longer the discoloration time. Ice water below 18 degrees is the best. 5、Heat change cup: Heat change requires hot water to change color, ice water at room temperature cannot change color. The higher the water temperature, the stronger the discoloration effect and the longer the discoloration time. The hot water below 50 degrees is the best. 1 x Cup Item Type: Temperature Color Changing CupMaterial: CeramicSize: Cup Diameter: Approx. 9cm / 3.5inCup Height: Approx. 3.8cm / 1.5inFull Water Capacity: 70mlWeight: Approx. 130 g / 4.6 ozDiscoloration: Cold feeling turns blue, hot feeling turns pinkInstructions for use: 1. Do not let hard objects or glass touch each other. 2. Please gently put it on the table. 3. If the temperature may change suddenly, please do not add hot water! 4. Do not use microwave ovens, dishwashers or dryers. 5. If possible, separate it from other tableware. It is recommended to clean it gently with a sponge. 6. After cleaning, turn it upside down to remove water, and then wipe it with a thick cotton cloth. 7. Do not stack. (When stacking, please put a soft cloth between them)