Multilayer program: the addition of a plastic film was the initial step to make brick containers impermeable to liquids and warmth-sealable. During the sixties, an aluminum foil began to be additional for the cardboard container to make certain much better protection and increase the shelf life of the packaged solution. https://gabletopcartons.health.blog/2025/05/05/dairy-liquid-packaging-with-gable-top-innovation-and-eco-friendly-materials/