Scent your Wool Car Diffuser Clip with your favorite fragrance. Simply unscrew the dropper bottle and drop 1-3 drops to each shape, refresh as you wish. Specially formulated to be use with our WOOL diffusers and not for use on skin. All of our fragrance oils are free from carcinogens, reproductive toxins, and other potentially hazardous chemicals often found in home fragrances. They are always Phthalate and Paraben-free. Please note that the car diffuser oils if spilled can potentially ruin the vinyl of the interior of your car or other surfaces if not wiped immediately. Please understand that we are not liable for any damages caused by spillages that may occur.