Seeking relief from dry air, cold, flu, cracked skin or just car odor? The MINI CAR AIR HUMIDIFIER works as both an air humidifier and essential oil diffuser! The pleasant smell will help to lift your mood, relieve tension and anxiety, boost the metabolism and much more. Simply plug the diffuser into your car's cigarette lighter with 100ml water and a couple drops of your favorite oil and that's it. The top can rotate, so you can even plug in at an angle and keep your diffuser upright.