Polyethylene Coating: A skinny layer of polyethylene on either side supplies durability. The outer layer protects the design and printing, though the inner layer acts as a sealant, creating the carton completely leakproof. The first patents for foods paperboard containers date back again to the beginning of the final century. https://gablecarton.art.blog/2024/10/29/the-future-of-eco-friendly-packaging-gable-top-cartons-across-industries/