Some ingredients in coffee is for humans still have health care function.
That coffee has so many advantages that how to maintain its taste is pure, it is used in the above the buttons, they say it is not the name of the button it has a professional call one-way valve, use this valve on coffee bags because coffee roasting produces carbon dioxide after coming out, packaging can make coffee package damage or directly contact with the air for a long time makes the aroma of coffee quality decline after loss of oxidation.So now will adopt the one-way valve design, can make the inside of the carbon dioxide discharged outside air into not to go, to maintain the quality and the aroma of coffee.