All Tightvac's have a unique patented vacuum seal closure system which allows moisture to escape, keeping your goods dry & oxygen free. The 3 oz. Tightvac is the perfect size storage for snacks, pet treats, vitamins, homeopathic remedies, herbs, prescription drugs, cosmetics, jewelry & any misc. small items. Great for travel. Tightvacs save you money and guarantee fresher for longer food storage than other typical containers on the market. Store any of the Tightvac containers conveniently in the pantry, on the countertop, in the refrigerator or freezer. The Tightvac reusable & easy to use system creates a vacuum seal simply by pushing the button on the lid as you close it/press again to open, simple! Use Tightvac storage containers to increase the shelf life of all your dry goods; coffee, tea, cereal, flour, bread, herbs, spices and even in bulk amounts. Use all of our products; Tightvacs, Coffeevacs, Everythingvacs & Vitavacs for a multitude of household storage puposes, from small to large, in a variety of colors & styles. Hand wash only.