Multilayer program: the addition of a plastic film was the first step to create brick containers impermeable to liquids and heat-sealable. In the 1960s, an aluminum foil began to be added into the cardboard container to be sure far better protection and prolong the shelf life of the packaged product https://waterinpaperbottle.fitness.blog/2025/04/09/revolutionizing-product-packaging-with-gable-top-containers/