Multilayer process: the addition of the plastic film was step one to produce brick containers impermeable to liquids and heat-sealable. While in the 1960s, an aluminum foil started to be extra to the cardboard container to guarantee greater protection and extend the shelf life of the packaged product or service. https://dairycartonsustainability.water.blog/2025/07/06/order-customized-carton-bottles-for-water-brands/