Tin mug with a volume of 350 ml made of aluminum with an anodized surface. Does not contain BPA, lead or phthalates. The folding handles are made of strong stainless steel wire. Volume markings with a resolution of 100ml are stamped on the inside. Anodizing creates a very strong and hard layer of aluminum oxide on the surface of the material, which prevents further oxidation, increases the strength of the material and its resistance to abrasion.