Due to our commitment to the safety of our customers we have upgraded our Nu-Flame Liquid Ethanol Fuel. The Safety-Pour Valve is a new protection feature in our upgraded liter containers. This 2-way check valve insert prevents the accidental ignition of fuel inside the bottle. Nu-Flame Liquid Ethanol Fuel is the GREENEST Fuel you can buy! Nu-Flame Denatured Bio-Ethanol fuel is a safe, eco friendly fuel made from 100% waste right here in the USA. Nu-Flame Fuel is clean burning creating no soot, smoke or hazardous fumes. Safe for use indoors and out, Nu-Flame provides a beautiful vibrant color flame and long burn time. Our New Bottles are fitted with a patent-pending Safety-Pour Valve insert which prevents the accidental ignition of the fuel inside the bottle. Bottles made with 30-40% recycled material. Contains 6% more fuel than a quart bottle, that is 22 MORE ounces per 12 pack! Contains BITR to deter children and pets from ingesting. Made in the USA from 100% Waste. Highly biodegradable, safe for the environment 2.5-4 hours burn time per quart.