Car Diffuser Refill – 30ml Glass Bottle with Gold Dropper. This refill contains diffuser base and fragrance oil. *Listing is for refills only. Separate listings for car diffuser styles!* Refresh your space on the go with our 30ml Car Diffuser Refill. Housed in a sleek glass bottle with an elegant gold dropper, this refill is designed to top up your existing car diffusers with wooden caps. Perfect for customers who love their favorite scents and want a sustainable, easy way to keep the aroma going. Details: 30ml glass bottle Gold dropper for mess-free refilling Compatible with wooden-cap car freshener Long-lasting, high-quality fragrance and diffuser base