Multilayer method: the addition of a plastic film was the first step to create brick containers impermeable to liquids and heat-sealable. Inside the nineteen sixties, an aluminum foil started to be added towards the cardboard container to be sure greater defense and lengthen the shelf life of the packaged solution. https://gabletopcartonjuice.blogspot.com/2025/05/smart-packaging-for-smarter-brands.html