Oxygen and light are the chief culprits behind coffee staling. Keep them out with the Filter Vacuum Sealed Coffee Canister.
The best way to keep coffee tasting fresh is to keep it away from excess moisture, air, and light. The Filter Vacuum Sealed Coffee Canister by Airscape has a specially designed lid which pushes out excess air and protects your coffee from moisture and ultraviolet light.
For more information on keeping your coffee fresh, take a look at this article: When is coffee "fresh" and how can I keep it that way?