sentences:  Tetra Pak uses aseptic packaging technology.In aseptic processing the product and the package are sterilized separately and then combined and sealed in a sterile atmosphere, in contrast to canning, where product and package are first combined and then sterilized.When filled with ultra-heat treated (UHT) foodstuffs (liquids like milk and juice or processed food like vegetables and preserved fruits), the aseptic packages can be preserved without being chilled for up to one year, with the result that distribution and storage costs, as well as environmental impact, is greatly reduced and product shelf life expanded.