Multilayer technique: the addition of a plastic movie was the first step for making brick containers impermeable to liquids and heat-sealable. During the nineteen sixties, an aluminum foil began to be added to your cardboard container to make certain better safety and prolong the shelf lifetime of the packaged solution. https://dairycartonsustainability.water.blog/2025/06/09/innovating-sustainability-with-eco-friendly-packaging-for-water-and-beyond/