Our Hanging Diffusers are perfect for small space such as a car, wardrobe or shoe cabinet. It comes in an 8ml glass bottle with wooden cab and cotton string that will provide a lasting fragrance for around 6-8 weeks. (you'll receive random shaped bottle) After receiving your car diffuser, untwist the wood cap and remove the plastic stopper. Replace the wooden cap back on and turn the bottle upside down for 4-5 seconds. T This will allow the oils to saturate the wood cap and cotton string and release the fragrance. Please turn the bottle upside down regularly to get a stonger scent.