Multilayer Method: the addition of the plastic movie was the initial step for making brick containers impermeable to liquids and heat-sealable. While in the 1960s, an aluminum foil started to be extra on the cardboard container to make certain improved safety and prolong the shelf life of the packaged item. https://wateringabletoppak.family.blog/2025/06/09/gable-top-milk-carton-a-smarter-sip-towards-a-greener-future/