The Café Olé airtight coffee jar is the perfect tool for keeping your coffee beans and grounds fresher for longer, and is a must-buy for coffee lovers everywhere! Made of premium 18/10 stainless steel, the container features an airtight lid that securely clasps onto the main body of the canister, while the one-way valve inside the device pushes all co2, oxygen, and other gases out of the container to create an airtight vacuum which is perfect for storing coffee. Thanks to the built-in adjustable calendar wheel on the lid, you can mark the exact day and month your coffee was opened, to accurately track the freshness of your beans or grounds!