Multilayer program: the addition of a plastic film was the first step to help make brick containers impermeable to liquids and warmth-sealable. In the sixties, an aluminum foil began to be additional into the cardboard container to make sure superior security and increase the shelf lifetime of the packaged merchandise. https://gabletopcartons.food.blog/2025/01/09/premium-gable-top-cartons-for-all-packaging-needs/