Multilayer Technique: the addition of a plastic movie was the initial step for making brick containers impermeable to liquids and heat-sealable. Within the 1960s, an aluminum foil started to be extra to the cardboard container to make certain much better safety and increase the shelf lifetime of the packaged item. https://mineralwaterinbox.wordpress.com/2025/05/05/the-rise-of-gable-top-packaging-in-modern-beverage-and-dairy-industries/