Multilayer program: the addition of a plastic film was the initial step for making brick containers impermeable to liquids and warmth-sealable. Inside the 1960s, an aluminum foil began to be added towards the cardboard container to make certain far better protection and increase the shelf lifetime of the packaged solution. https://topcartons.family.blog/2024/10/29/the-versatile-and-sustainable-choice-gable-top-packaging/