Have you ever carefully observed the packaging bag of coffee beans? The structure of the coffee packaging bag is very special. Have you noticed that there are several "small holes" in the back of the coffee bag?On the back of the coffee packaging bag, we often see a round raised air valve with a cir

Making a cup of coffee is easy, but making a cup of perfect coffee requires extra care. One of the most important things is to start with high-quality premium coffee beans that have been properly stored to maintain freshness and flavor. But what does "proper storage" mean? How long can coffee beans