All our reed diffusers have wonderful Aromatic scent and its flame-free .All our reed diffusers are environmentally friendly, Our oils are created by our high standards essential oil. each 2.75 mm or 3 mm reed sticks contains 20 or more individual cellular stections that run from top to bottom of the reed like 20 micro-mini straws, totally open to pull liquid from bottom to top .This wicks the fragrance from inside the bottle, carries it to the top surface of the reed and releases the fragrance into the air naturally.