Multilayer method: the addition of a plastic film was the first step to produce brick containers impermeable to liquids and heat-sealable. While in the sixties, an aluminum foil started to be additional on the cardboard container to ensure far better protection and lengthen the shelf lifetime of the packaged item. https://gablecarton.water.blog/2024/12/05/gabletop-pak-revolutionizing-sustainable-packaging-solutions-for-a-greener-future/