katito Cowboy cap USB Mini Humidifier Air Diffuser Mist Maker (Black) Provides relief to cold and flu symptoms, and adds moisture to air in the immediate area The environmentally-friendly USB Portable Humidifier reuses bottles and has a low power output. Convenient to use anytime and anywhere the USB Portable Humidifier is a personal-use humidifier that is small enough to put in a purse, laptop bag, or suitcase Made of ABS plastic Size: 13.5 cm x 7 cm