100% brand new and high qualityFeatures:When you heat the water in a glass, it will slowly form a beer bubble,The color changing ink used in the color changing cup is a kind of non-toxic, pollution-free and pollution-free ink synthesized from biomaterials. Its principle is: the temperature sensitive material is printed on the cup body, and the material used belongs to the thermal sensitive material, which is resistant to high temperature of 320 ℃, non-toxic, lead-free and Chromium-free. It has passed the test of American FDA and European lfgb and other standards.Specification:Capacity: 301-400mlMaterial: CeramicDimensions: 8.2*9.6cm/3.23*3.78inColor: BlackQuantity: 1 PcNote: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!Package includes:1 x Ceramic Mug