There is a correlation between coffee freshness and coffee storage (i.e., how, where, and for how long).  From the moment coffee is roasted, staling reactions begin to occur.  These staling reactions cause the aroma and flavor of freshly roasted coffee to decrease over time.  Exposure to heat, moisture, and oxygen accelerate these staling reactions.  Therefore, an ideal environment for coffee storage is one that is cool, dry, and free of oxygen.

In order to decide what coffee storage system is right for you, you should first decide how long you plan to store the coffee.  If you purchase freshly roasted coffee in amounts that you can consume within two to three weeks, you will still want to minimize the coffee’s exposure to heat, moisture, and oxygen, but how you store coffee is less of a concern than if you store it for longer periods of time.  Airtight containers such as mason jars are a very good and affordable storage solution for short term coffee storage of less than one month.  Just leave the lid slightly lose for the first few days or use a silicone fermentation lid to keep air out while also allowing CO2 to escape.  If you need a longer-term storage solution, consider vacuum sealing and freezing coffee in amounts that you will use in a week. 

For more information check out this post at Seven Miles.