Multilayer method: the addition of a plastic movie was the first step for making brick containers impermeable to liquids and heat-sealable. During the nineteen sixties, an aluminum foil started to be added on the cardboard container to make certain better security and lengthen the shelf life of the packaged merchandise. https://gabletop.business.blog/2025/01/09/gabletop-pak-leading-the-way-in-sustainable-packaging-solutions/