Polyethylene Coating: A Thin layer of polyethylene on either side gives longevity. The outer layer shields the design and printing, whilst the internal layer functions for a sealant, building the carton totally leakproof. The first patents for food items paperboard containers date again to the start of the final century. https://sites.google.com/view/gabletoppak/gable-carton-is-the-sustainable-shift