The Tightvac Storage System is a unique patented vacuum seal closure system, which allows moisture to escape, keeping your goods dry & oxygen free.The 350ml Tightvac is the perfect size storage for coffee, tea, cookies, snacks, pet treats, sugar, oatmeal, cereal and any other dry good items.Great for travel & camping.Tightvacs save you money and guarantee fresher for longer food storage.The Tightvac's 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.Use all of our products; Tightvacs, Coffeevacs, Everythingvacs & Vitavacs for a multitude of household storage purposes, from small to large, in a variety of colours & styles.Hand wash only.