This is a tumbler that changes color when you put in a hot beverage. It comes in cute color variations that look great on social media. The fur sleeve is also convenient and a cute feature. The color of the tumbler changes when you pour a beverage of approximately 45 degrees Celsius or higher into the cup. It has a capacity of 440ml, which is the perfect size for drinking hot beverages. 【Important Notes】 ＜Tumbler＞ ■ Heat resistance: 100 degrees Celsius ■ Microwave: Not allowed ■ Dishwasher: Not allowed ■ The degree of color change varies depending on the temperature of the beverage. ■ Do not use in the freezer as this may cause damage. ■ Do not leave beverages in the tumbler for extended periods. ■ Beverages with strong colors or odors may transfer to the tumbler. ■ This product is not a sealed container. ■ The tumbler itself will become hot when hot beverages are poured in, so use the included sleeve and be careful not to burn yourself. ■ The print may peel off due to friction with alcohol, chemicals contained in hand cream, or hard objects. ■ Do not place near fire or in high-temperature locations exposed to direct sunlight. ■ Avoid using chlorine bleach. ■ If the color change function deteriorates and the color no longer changes, warming the tumbler to around 40-50 degrees Celsius may improve it. ■ Conversely, if the color does not return from the warm color, putting it in the refrigerator and cooling it to 0-10 degrees Celsius may improve it. ＜Sleeve＞ ■ Due to the nature of the product, there may be slight variations in size, color, and texture. ■ Due to the nature of the material, it may discolor if exposed to direct sunlight or light for extended periods. ■ Color fading or color transfer may occur. Please be especially careful of friction when wet. ■ When cleaning, hand wash separately and gently to avoid changes in appearance or color transfer to other items. ■ Avoid scrubbing. ■ It will shrink when washed with water. Shape it and dry it in the shade. ■ Do not pull or rub the fur part. ■ Do not place near fire or high temperatures. ■ Even with the sleeve attached, the tumbler itself may be hot, so be careful not to burn yourself.