+ Brandimage Paper Bottle Concept

Design agency Brandimage has developed a concept for a sustainable paper water bottle. On their site, they discuss their philosophy for Responsible Design: being accountable, being smart, and establishing new standards. This philosophy manifests itself in a paper water bottle, questioning the need for the standard PET bottles that we know and expect. It is made from food-safe and fully recyclable materials.We've seen many paper pulp packages on the shelf over the past couple years, but the ability to store foods and beverages inside is what makes this concept stand out. I'd like to learn more about the waterproof film inside that makes the bottle work. Does the film currently exist? To what extent is this concept technically feasible?