Multilayer Program: the addition of the plastic film was step one to produce brick containers impermeable to liquids and warmth-sealable. Inside the nineteen sixties, an aluminum foil began to be added towards the cardboard container to make certain much better defense and lengthen the shelf lifetime of the packaged item. https://eco-friendlygabletopforoils.blogspot.com/2025/02/gable-top-milk-revolutionary-packaging.html