A. Pls don't scrape on the printing with shap & hard tools
B. Wash with hand, not suitable in Dishwasher machine and Heat-disinfection machine;
C. Avoid Shock cooling & shock heating, example, take the mug from freezer then put boiling water immediately.
D. Don't expose under the sunshine for a long time.
The mugs at right side are before color changing, the image at left side is after we putting hot water.