We use higher GSM paperboard in our water cartons to ensure protection and freshness. We provide the liberty to settle on different types of water which may be packaged in flexible sizing selections. The internal lining of such bottles is often made out of a thin layer of biodegradable plastic https://pinpdf.com/why-tetra-pak-water-packaging-is-better-for-the-environment-b266cc95aab409d7e1442474063e9d89.html