Very clean burning fuel. Be careful using it in manual burners. Wash your hands after filling the chamber & prior to igniting the flames. This stuff is very flammable. I read some reviews stating that water won't even put the flame out. It has to be smothered or deprived of oxygen so be careful using it. There's a significant price galge on Wayfair's bio-ethanol fuel. I bought a 3 bottle pack of fuel simultaneously with a biofuel firepit burner but I found the fuel much cheaper elsewhere. A 48 pack of this fuel is a whopping $60 cheaper on Amazon. That's why I only gave 4 stars instead of 5 on this review. Price galging. Stay safe!