Only the highest quality stainless-steel of the type DIN 18/8 (18% chrome, 8% nickel, 74% steel) is used for the Tiffin Box. The German GALAB Laboratories have certified this material as absolutely food safe: our Tiffin Box is acid resistant and shows no odor or taste deviations – no matter what kind of food is transported. We made sure that you do not have to worry about health risks when using our Tiffins.