Multilayer process: the addition of the plastic film was the first step to produce brick containers impermeable to liquids and heat-sealable. Inside the nineteen sixties, an aluminum foil started to be included to the cardboard container to be sure better safety and increase the shelf lifetime of the packaged merchandise. https://waterinbox.movie.blog/2025/03/10/how-white-labeling-of-water-bottles-can-elevate-your-brand-identity/