Multilayer technique: the addition of a plastic film was the initial step to generate brick containers impermeable to liquids and warmth-sealable. In the nineteen sixties, an aluminum foil began to be added on the cardboard container to make certain greater protection and lengthen the shelf life of the packaged item. https://topcartons.fitness.blog/2025/04/09/why-gable-top-packaging-is-taking-over-modern-sustainable-markets/