Images are printed on the porcelain mug (80% porcelain - 20% ceramic) with the Sublimation Printing (heat printing) System. Sublimation Porcelain mug UltraCoating is AAA grade. Our products are sent with Styrofoam and Sturdy Packaging Method to Prevent Cargo Breaks. Our mugs are suitable for washing in the dishwasher. However, due to the chemicals used in dishwashers, it is natural for deformations such as scratching and fading to begin. We Recommend You Hand Wash For Long-Lasting Use. (High Temperature and Chemical Substances in the Dishwasher Will Damage the Printing Quality.) Printing is Applied to Both Surfaces of the Glass. Product Dimensions Product Height: 9-5 cm Product Diameter: 8 cm There May Be +/-2-5% Pixel Color and Print Variations.