Multilayer technique: the addition of the plastic movie was step one to help make brick containers impermeable to liquids and heat-sealable. In the sixties, an aluminum foil began to be extra to your cardboard container to make certain much better protection and increase the shelf lifetime of the packaged solution. https://gabletopcartons.health.blog/2025/04/09/why-gable-top-packaging-is-taking-over-modern-sustainable-markets/