Tetra Pak started in 1943 in Sweden launching their first milk product. From 1944-1951, they introduced new techniques for coating paper with plastic and sealing below liquid levels. In 1993, Tetra Pak consisted of 4 industrial groups including Tetra Pak. The layers of a Tetra aseptic package include polyethylene, print, paperboard, aluminum foil, and more polyethylene. Tetra Pak has a wide range of packaging systems including Tetra Brik, Tetra Fino, Tetra Top, Tetra Classic, Tetra Rex, and Tetra Recart. Major associates of Tetra Pak include Nestle, Amul, and Mother Dairy.