This Vacuum Coffee Canister 800ml Jar has a tight seal that will keep your coffee beans fresh for a long time! It is of durable stainless steel material! What makes this canister so ideal for storing coffee is that it has a dial. You can use this to set the time to help you remember when the coffee is ready. This canister is suitable for storing fresh coffee beans until they are ready for consumption. There is also an exhaust valve. This prevents the gas that the coffee beans release from building up inside the jar.