Enviro-Log Color-Flame Single Packs are an easy way to enjoy amazing color with your wood fire. Color-Flame is safe and easy to use. It is self-contained with no exposure. Just simply toss on one, two or three unopened packets to your wood fire to enjoy up to 60 minutes of amazing color. Color-Flame can be used for any indoor or outdoor wood burning fire. It is great entertainment. It works instantly, with no smoke odor or fumes.