3 different sizes. There are three Stainless steel coffee jar in this set. The 750ml and 500ml and 250ml airtight coffee canisters have CO2 filters in the BPA-free lid to keep oxygen out of your coffee beans. They also include date tracker wheels so you can know when your coffee is about to expire. On the inner side of each canister is a measurement scale to help you know when to add more coffee. Light damages the quality of coffee, so the stainless steel body helps keep light off of your coffee beans or grounds, which will preserve the flavor and aroma even more.
Vacuum seal. This Stainless steel coffee jar uses a partial vacuum seal to prevent your coffee beans or ground coffee from getting stale. To seal it, you push a button on the lid as you close it, sealing in freshness and keeping out air. Odors and aromas will stay in the airtight container with the food, so you won’t have any odors lingering around. This coffee jar will store up to 750ml of coffee beans. It is thin, which makes for more room on the counter or shelf. It is available in a variety of colors and designs to fit your particular style or plain black with or without logos. This coffee storage container is easy to use, easy to clean and has multiple purposes. You don’t have to use it for just coffee–you can store other foods too.