Multilayer technique: the addition of a plastic movie was the first step to generate brick containers impermeable to liquids and heat-sealable. Inside the nineteen sixties, an aluminum foil started to be included to your cardboard container to guarantee far better defense and extend the shelf lifetime of the packaged products. https://gabletoppak.politics.blog/2025/02/25/gable-top-pak-crafting-a-sustainable-legacy-with-every-pak/