With just 5 ounces of 70% or 91% isopropyl rubbing alcohol, you will have roughly 50 minutes of burn time. With soot only where the flame touches (in a ventilated area), no carbon monoxide, and safe to cook over, FLÎKR Fire is as versatile as you need it to be. And heat? While emitting a cozy warmth there is no need to turn down your a/c. And being safe to cook over FLÎKR Fire makes s’mores more possible than ever before!