These natural brown reed diffuser sticks are the best alternative to candles. Strong, vibrant scents. No risk of fire. Reed diffusers have a wonderful aromatic scent while being flame-free. Absolutely no heat is needed. This makes them safe for classrooms, offices, nursing homes, homes. Reed diffusers emanate NO soot or film onto your furniture, walls and ceiling-the way paraffin candles do. The best thing about reed diffusers...they last for months! Insert the reed diffusers into the oil. Turn over once to expose oil-moistened reed diffusers to air. The oil will continue to wick up the reed diffusers and scent your room for several months. Turn reed diffusers occasionally to refresh scent. After a couple of months you may need to insert new reed diffusers into you oil.