Our mini car oil diffusers are a chic look in a car air freshener. Made with your choice of fragrance oil. It works just like a home oil diffuser but made for your vehicle. Our diffusers are reusable so if you are needing a refill without getting a new diffuser think about just getting a refill pouch. Refill pouch just comes with the pouch in your choice of fragrance. Does not include a new diffuser vessel.