Multilayer method: the addition of the plastic film was the initial step for making brick containers impermeable to liquids and heat-sealable. While in the nineteen sixties, an aluminum foil started to be included to your cardboard container to ensure better defense and prolong the shelf lifetime of the packaged product. https://topcartons.movie.blog/2025/10/09/leading-gable-top-carton-manufacturers-eco-friendly-water-and-dairy-packaging/