As pointed out earlier, polyethylene is applied like a coating over the paperboard to offer a humidity barrier and facilitate sealing. This will involve using accepted elements, making sure tamper-evidence, and labeling accuracy. Sustainability initiatives also impact materials variety, with quite a few companies searching for recyclable or biodegradable alternatives https://waterincarton.sport.blog/2025/08/26/water-in-sustainable-pak-eco-packaging-that-protects-the-planet/