Keeping your beans fresh is just as important as how you prepare your coffee and where you buy it. The best way to protect the flavor is to store roasted coffee beans in an air-tight container. These Hario glass jars have a great flip-lock mechanism at the top that easily locks the lid to the jar. No air goes in, no flavor goes out. This 200 ml jar holds roughly 250g of beans, so if you tend to order more than one bag at a time, we suggest you get two of these.