Package contents: 10 x 8ml hanging perfume aromatherapy bottles. How to use: 1. Unscrew the wooden cover 2. Remove the inner plastic cap from the bottle 3. Put your favorite essential oil/perfume into the car perfume bottle (within 6ml) 4. Gifting: Install the inner plastic cover and wooden cover to prevent perfume volatilization. So give this aroma diffuser bottle for an occasion or someone in your life: birthdays, anniversaries, festivals, men, women, etc. 5. During use, you need to remove the inner plastic cover to allow the fragrance to evaporate better (if the fragrance is not enough, please invert the bottle for 3 seconds) 6. Hang the perfume bottle pendant on your car rearview mirror (or wherever you want) No need to add water, when you smell the aroma of the oil essential oil diminish, simply pass the bottle and hold for a few seconds to allow the essential oil to penetrate into the wood. Application: Empty car perfume bottles can be filled with essential oils, perfumes, perfumes, make the air in your car fresher and can be hung in car, office, home, bedroom, closet, closet, toilet. You will get 10 empty glass car air freshener diffuser bottles, no perfume or essential oils included The ideal car pendant and interior decoration for a romantic ambiance The cover is Made of wood that is durable yet breathable enough to release just the right amount of aroma to fill your car/room. Shape: round, square, diamond, small and portable, with a capacity of about 8ml. With hanging chain design, it allows you to decorate glass bottles in your car/home/office Good quality product