Multilayer system: the addition of a plastic film was the first step to generate brick containers impermeable to liquids and heat-sealable. Within the 1960s, an aluminum foil began to be added towards the cardboard container to ensure superior security and increase the shelf lifetime of the packaged product or service. https://gabletopmilkcarton.art.blog/2025/04/09/how-gable-top-packaging-is-shaping-the-future-of-consumer-goods/