Multilayer procedure: the addition of a plastic film was the initial step for making brick containers impermeable to liquids and heat-sealable. Inside the sixties, an aluminum foil started to be added towards the cardboard container to be certain better protection and extend the shelf life of the packaged item. Outcome https://gabletopcontainers.food.blog/2025/04/09/sustainable-solutions-through-gable-top-milk-packaging/