We at FiXX love the CoffeeGator bean canister. Not only is it perfectly airtight, but it also has a one-way valve. This allows naturally occurring Co2 to escape away and stops flavour zapping oxygen from entering. The lid of the BPA-free canister has a handy date wheel. So you can set the roast date, expiry date or the date you bought your coffee, and track its freshness.