The Tightvac Storage System is a unique patented vacuum seal closure system, which permits moisture to escape, keeping your goods dry & oxygen free. Minivacs are a great pocket & purse size storage for vitamins, homeopathic remedies, herbs, prescription drugs, cosmetics, jewelry & any misc. small items. Great for trip. Tightvacs save you money and guarantee fresher for longer food storage than other typical containers available on the market. The Tightvac’s easy to make use of system creates a vacuum seal simply by pushing the button at the lid as you close it/press again to open, simple! Use Tightvac storage containers to extend the shelf life of your whole dry goods; coffee, tea, cereal, flour, bread, herbs, and spices. Use all of our products; Tightvacs, Coffeevacs, Everythingvacs & Vitavacs for a multitude of household storage purposes, from small to huge, in quite a few colors & styles. Hand wash only.