Why is there a valve in my coffee bag?

Coffee Bag Laminated Pouch with One Way Degassing Valve
Coffee Bag Laminated Pouch with One Way Degassing Valve

Have you ever wondered why fresh roasted coffee beans are packaged in a bag with a special valve? (It’s not so you can smell the coffee.) It is because after roasting, the coffee gives off carbon dioxide and without the “one-way valve”, your coffee bag could burst. The valve allows the built up gas to escape.















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