This 20-piece set of 15 ml glass car diffuser bottles is designed for refillable fragrance use with a decorative floral touch. Each bottle is made of glass and features a vintage-style patterned film with floral designs; the patterns are shipped at random, so each bottle may look slightly different. The bottles include a small transparent inner lid and an outer wooden lid, along with a hanging string. The capacity is approximately 15–18 ml, and the bottle dimensions are about 4.8 x 1.8 cm (1.9 x 0.7 inches). To use, remove the inner cover, add your favorite essential oil or fragrance oil, and place the outer wooden lid on top. The bottle can be hung or placed on a table or in a corner. The floral patterns are intended to add a decorative element to the car, home, or office. Because the bottles are empty, fragrance liquid is not included. The refillable design allows you to switch fragrances after the previous scent has diffused. This set is suitable for people who enjoy decorative, vintage-style car accessories and want a larger supply of hanging diffusers for multiple spaces.