Multilayer process: the addition of the plastic movie was the initial step to make brick containers impermeable to liquids and heat-sealable. Inside the nineteen sixties, an aluminum foil began to be additional on the cardboard container to make sure superior security and lengthen the shelf lifetime of the packaged solution. https://waterinpaperbottle.fitness.blog/2025/06/09/gable-top-milk-carton-a-smarter-sip-towards-a-greener-future/