Multilayer system: the addition of the plastic film was step one to generate brick containers impermeable to liquids and heat-sealable. Within the sixties, an aluminum foil started to be additional towards the cardboard container to make sure greater security and prolong the shelf life of the packaged item. The trend https://durablegabletopcontainer.blogspot.com/2025/10/eco-friendly-liquid-packaging-gable-top.html