Polyethylene Coating: A skinny layer of polyethylene on each side offers sturdiness. The outer layer shields the design and printing, when the internal layer functions like a sealant, producing the carton entirely leakproof. The primary patents for food paperboard containers day back again to the beginning of the final century. https://mineral-water-in-carton.mystrikingly.com/blog/water-in-sustainable-pak-eco-packaging-that-protects-the-planet/i/view_as_owner