Many coffee brands package their beans in a foil bag with a valve to ensure optimal storage. If you source your beans from the local coffee shop in a cute logo-stamped paper bag or shop in the bulk section of the supermarket, you’ll want an opaque and airtight container to store them. After coffee beans are roasted, they give off carbon dioxide. This is a good thing. At the same time, you should protect your beans from being infiltrated with oxygen, which makes them stale. These four excellent storage containers minimize oxidation, so you can enjoy fresh coffee for longer.