Why does the coffee bag need Valve?

Since the roasted coffee beans produce carbon dioxide, this valve can remove carbon dioxide from the bag and also block the oxygen outside the bag from entering the bag to oxidize the beans, thus ensuring the fresh quality of the coffee and eliminating the resulting coffee bag.

The risk of the bulge expanding or bursting.

In addition, the air valve is installed on the coffee bag, the customer can directly squeeze the bag at the time of purchase。

And the aroma of the coffee is directly transmitted from the bag to let the customer smell its fragrance, so that the customer can better confirm the freshness of the coffee.