Polyethylene Coating: A skinny layer of polyethylene on each side delivers durability. The outer layer guards the design and printing, whilst the interior layer functions as being a sealant, producing the carton completely leakproof. The first patents for foods paperboard containers date back to the start of the last century. https://innovativegabletop.blogspot.com/2025/02/the-role-of-gable-top-cartons-in.html