Brand New 18ct. Natural Cotton Food grade paraffin wax This composition ensures that the sticks provide safe and stable fire for about 10 minutes (enough time for making a stable BBQ or stove warm-up to the perfect condition). This achieved with no unpleasant side-effects, such as nasty smell, residues, scent of oil, explosives & other dangerous attributes of starting a fire. Eco Firesticks are safest when starting a fire outdoors, at home, a fireplace, or grilling meat. They are flexible, so you can twist them any way.