Multilayer system: the addition of the plastic movie was step one to generate brick containers impermeable to liquids and warmth-sealable. During the nineteen sixties, an aluminum foil started to be extra into the cardboard container to be sure far better safety and prolong the shelf lifetime of the packaged solution. https://gabletoppackaging.tech.blog/2024/09/12/gabletop-pak-the-ultimate-solution-for-beverage-packaging/