Multilayer program: the addition of a plastic film was the first step to produce brick containers impermeable to liquids and heat-sealable. While in the 1960s, an aluminum foil began to be extra to the cardboard container to make certain superior defense and increase the shelf lifetime of the packaged solution. https://www.tumblr.com/gabletoppak/765649459786989568/the-future-of-eco-friendly-packaging-gable-top?source=share