how to store coffee

Storage
Once roasted, coffee beans must be stored properly to preserve the fresh taste of the bean. Ideally, the container must be airtight and kept cool. In order of importance, air, moisture, heat, and light are the environmental factors[52] responsible for deteriorating flavor in coffee beans.

Folded-over bags, a common way consumers often purchase coffee, are generally not ideal for long-term storage because they allow air to enter. A better package contains a one-way valve, which prevents air from entering.[