Multilayer program: the addition of a plastic movie was the initial step for making brick containers impermeable to liquids and heat-sealable. From the nineteen sixties, an aluminum foil started to be additional on the cardboard container to ensure much better safety and extend the shelf life of the packaged solution. https://gabletopcontainers.food.blog/2025/02/07/gable-top-carton-a-versatile-and-sustainable-packaging-option/