Multilayer Program: the addition of a plastic movie was the first step to make brick containers impermeable to liquids and warmth-sealable. While in the sixties, an aluminum foil started to be extra on the cardboard container to ensure much better safety and increase the shelf life of the packaged product. https://waterinpaperbottle.video.blog/2025/08/26/water-in-sustainable-pak-eco-packaging-that-protects-the-planet/