Multilayer Process: the addition of a plastic film was step one to help make brick containers impermeable to liquids and heat-sealable. In the nineteen sixties, an aluminum foil began to be included towards the cardboard container to guarantee superior protection and lengthen the shelf life of the packaged merchandise. Their https://medium.com/@GableTopPackaging/eco-friendly-water-packaging-the-future-with-gable-top-pak-1b7db354889b