Multilayer program: the addition of the plastic film was the first step for making brick containers impermeable to liquids and heat-sealable. In the nineteen sixties, an aluminum foil started to be extra towards the cardboard container to make sure superior security and extend the shelf life of the packaged solution. https://gabletopcartonbulkorder.blogspot.com/2025/08/green-future-in-every-sip-eco-water.html