Polyethylene Coating: A Skinny layer of polyethylene on either side offers durability. The outer layer shields the design and printing, although the inner layer acts as a sealant, earning the carton fully leakproof. The first patents for foodstuff paperboard containers date back again to the beginning of the last century. https://ecofriendlypackagingforwater.blogspot.com/2025/06/tailored-for-tomorrow-sustainable.html