Aluminum Foil Coffee Bag With Valve

Aluminum foil flat bottom reusable side zipper coffee bags with one-way air valve.  The one-way air valve keeps the coffee beans and roasted coffee fresh. Excess gas flows from the inside to the outside without returning gas, keeping food fresh. Not only to ensure that the coffee is fresh, but also to store other nut snacks and so on. You can attach your own brand label on the surface as a retail or sample display package.