Wise IstaFire 4 Gallon Bucket. Unlike similar products, WiseFire does not contain any harmful chemicals or vapors, making it a perfect choice for people, food and the environment. Boils approximately 240 cups of water. An ideal source of fuel for emergency preparedness and outdoor use. FEATURES: Safe to store with a 25 year shelf life and stores safely near food, Easy to light and burns in wind, rain, sleet or snow, Burns "green" - Clean alternative with no harmful chemicals, Grab and go Lightweight and simple to transport design, Nonvolatile-no risk for unexpected fires or flare-ups, Optimal fire starter that lights the first time, Store in a cool, dry place to retain longer shelf life and better results.