This two-piece hanging car air freshener set is designed with a blue ocean scent and a wooden expanding bottle cap. Each bottle contains approximately 10 ml of fragrance liquid, and the wooden cap is intended to absorb the scent and release it gradually as the car moves. The set is described as providing a continuous fresh fragrance for around 60 days per bottle under normal use, though actual duration will vary with temperature, airflow, and usage conditions. The bottle is made of thick glass, and the cap is made of wood; the fragrance is described as containing essential oils and being free of alcohol and harmful chemicals, but users with sensitivities should review the ingredients or test carefully. The hanging design allows the bottle to be suspended from a rearview mirror or another convenient spot, and the gentle swaying motion helps release the scent. The product can also be used in a wardrobe, bedroom, or other small space. To use, remove the safety cap, invert the bottle for about 10 seconds to let the fragrance soak into the cap, and hang it with the included rope. This set is a practical decorative air freshener for people who prefer a ready-to-use ocean-scented hanging product.