Multilayer process: the addition of the plastic film was the first step to produce brick containers impermeable to liquids and heat-sealable. Inside the 1960s, an aluminum foil started to be added to the cardboard container to ensure better protection and extend the shelf lifetime of the packaged product or service. https://mineralwaterinbox.wordpress.com/2025/02/26/customized-bottles-gable-top-paks-eco-smart-packaging-revolution/