Polyethylene Coating: A thin layer of polyethylene on each side provides toughness. The outer layer shields the look and printing, when the inner layer acts like a sealant, building the carton wholly leakproof. This method enables the production of long lasting shelf goods in a way exactly where Tetra Pak https://medium.com/@GableTopPackaging/free-water-advertising-gabletop-paks-eco-innovative-edge-e6b5032413fb