OIL BASE CONCENTRATED FORMULA. * 2 oz Refresher" Brand Liquid Fragrance has unlimited uses. * Add to your Rainbow or any Water Filtration Vacuum System * Drop a little in your Humidifier, Air Filters or Freshen Potpourri with your favorite fragrance. * For use in the Home, Office, Pet Areas, Doctor"s Offices, Autos and RV"s, etc.