What is the purpose of the exhaust valve on coffee bags? Can you squeeze it to smell the aroma?
Squeeze it, pinch it, and so much fragrance will spray out. Many people may have observed that when customers purchase coffee beans, they will first put their nose close to the only hole in the packaging bag, squeeze the bean bag with their hand, and smell the gas squeezed out from the hole. Have you read "Why doesn't coffee taste as good as it smells?"




