Multilayer program: the addition of a plastic movie was the first step to help make brick containers impermeable to liquids and warmth-sealable. From the 1960s, an aluminum foil began to be added into the cardboard container to be certain far better security and extend the shelf life of the packaged https://waterinpaperbottle.politics.blog/2025/08/26/water-in-sustainable-pak-eco-packaging-that-protects-the-planet/