Multilayer system: the addition of the plastic movie was step one for making brick containers impermeable to liquids and heat-sealable. While in the nineteen sixties, an aluminum foil began to be extra to the cardboard container to guarantee much better safety and increase the shelf life of the packaged merchandise. https://gabletoppak.politics.blog/2025/01/09/gabletop-pak-durable-and-eco-friendly-packaging-for-every-need/