This elegant double wall mug is strikingly thin thanks to its innovative material. Even though the so-called eggshell porcelain is less than one millimetre thick, the porcelain does not conduct any heat to the outside. However, differing from the porcelain around the area where the user holds the cup, the upper part conducts heat, allowing users to test the water temperature. Thus, the cup successfully prevents scalding both when drinking and touching.