The protective function of the one way valve
one way valve can not only effectively prevent the outside oxygen from entering the bag, but also ensure that the aroma of the coffee beans is retained for a long time. Through it, we can gently squeeze the packaging bag when buying coffee, and we can smell the charming coffee aroma through the small hole. For the unpacked coffee beans, it is recommended to put them into the one-way valve bag to continue to exhaust. After 48 hours, they can be moved to a glass sealed jar for further preservation.
