Coffee bags are a kind of sealed bag specially designed for storing coffee, usually with moisture-proof and oxidation-proof function, which can effectively protect the freshness and taste of coffee. Coffee bags with valve are usually made of food-grade materials, such as polyethylene (PE) or polypropylene (PP), which have excellent sealing performance and durability. These bags can... https://www.yrpackage.com/category/coffee-bag-packing-bag/