Multilayer Program: the addition of the plastic film was the initial step to make brick containers impermeable to liquids and heat-sealable. During the nineteen sixties, an aluminum foil began to be additional for the cardboard container to make certain better protection and extend the shelf life of the packaged merchandise. https://waterintetrapak.fitness.blog/2025/06/09/sustainable-thinking-begins-with-gable-top-carton-manufacturers/