Bottle Cap Humidifier by Mistee(TM) Compact and Lightweight Personal Humidifier Great for Work, Home, or Travel- USB Cable Plugs into a Computer, Laptop, or AC Adapter Ultrasonic Technology Produces Cool Mist Helps Relieve Dry Throat, Sinuses, Combat Dry Itchy Skin and Chapped Lips. Eases Symptoms of Colds, Flu, and Bronchitis