D+The Ultimate 1D+The CFV2 was specifically designed for 1 pound of Coffee. Tea people - it will hold 10 to 16 oz of Darjeeling and green teas. Coffeevac's have a unique patented vacuum closure system, our 2 way valve, allows the carbon dioxide from the beans to slowly escape, without letting oxygen in. Solid and tinted models protect light sensitive beans and tea leaves. Coffeevac's save you money and guarantee smooth rich coffee flavor. The multiuse 16D+The United States patent office granted us a patent on a vacuum container – Our Vacs create a partial vacuum – The same volume of air as the cap is removed and for human purposes this is enough to keep most goods fresh and edible for long periods of time. For the engineers out there technically speaking there is no vacuum until the cap is pulled upward without pressing the button. Either way the Vacs will keep goods fresher for longer and prevent weevil & bug infestations. This reality is why globally we have sold over 10D+The Coffeevac patented system is able to preserve goods for 1 year and beyond by allowing products to breath and degas. Almost all food goods are smell proof inside the Vacs , however some products like freshly roasted coffee and medical herbs may degas, leaking there odor. Our 2D+Yes the Vacs are made with NSF & FDA approved PS # 6D+We offer 10 different sizes and 3D+