The double layer silicone seal and way exhaust valves design prevents air,, odors and other impurities from entering the vacuum container When you need to remove your coffees bean, simply use your finger to lift the silicone plug in the top center of the canister to open the vacuum container AUTO VACUUM COFFEE CANISTER: Press the start button and the indicators light turn blue to pumps the airs out of the coffee container When you open the lid, the coffees bean storage canister will start the vacuum program after 10-15 seconds of detecting air It can effectively help you keep fresher coffees bean, the crunching of nut, and retain the flavor and color of food Our airtights coffee canister make from materials full of durability PLEASE NOTE: After coffees bean, press down firmly on the lid or twist it to ensures the sealing gasket adheres tightly to the bottle, air leakage