Made by Simply Earth, this adorable car diffuser is portable and easy to use with a simple and elegant design. Upgrade your ride with style and function, say goodbye to chemical-based air fresheners, and unleash the power of essential oil to keep you calm and focused while you drive. To Use: Unscrew the cap and fill the bottle with your favorite essential oil. Replace the wood cap. Hang your car diffuser from your rearview mirror. Quickly tip the bottle upside down to allow the oil to saturate the wood. Then, return the bottle to its upright position. Tip the bottle once daily (or as needed) to keep your car smelling amazing. Enjoy! No water or electricity is needed.