Multilayer method: the addition of the plastic movie was the first step for making brick containers impermeable to liquids and heat-sealable. While in the 1960s, an aluminum foil started to be added to your cardboard container to be certain improved safety and increase the shelf lifetime of the packaged item. https://gabletop.finance.blog/2024/09/12/the-rise-of-gable-top-packaging-solutions/