Multilayer Method: the addition of a plastic movie was the first step to help make brick containers impermeable to liquids and heat-sealable. During the nineteen sixties, an aluminum foil began to be additional into the cardboard container to guarantee superior security and extend the shelf life of the packaged merchandise. https://sites.google.com/view/gable-top-packaging/gable-top-cartons-the-future-of-sustainable-packaging