At work, we drink a lot of coffee, that we coffee drinkers pitch in and pay for; the company doesn't provide coffee (govt contracting rules, different colors of money, reasons, blah blah...). We want to start buying the big bags of beans at Costco to save money, but we don't have a good way to keep the beans fresh for the length of time it takes to finish a bag. We drink so much that the smaller bags at Walmart, Target, etc. are gone in no time and they're expensive. What would you all suggest for a storage solution? Assume it would take us 4 weeks to go through a big bag of beans. Thanks.