Sage & Co Reed DiffusersAbout this product Our custom Reed Diffusers are all hand poured in small batches here at Sage & Co. Reed Diffusers bring constant fragrance to any room without the heat or flame. Use: Place diffuser on a flat surface, remove black collar and carefully pop the plastic cork out of the container. Twist the black collar back on and insert the wooden reeds. When all of the oil is gone, it is time to replace your diffuser.