Vicks Filter- Free Ultrasonic Visible Cool Mist Humidifier for Medium rooms, 1. 2 Gallon With Auto Shut- Off, 30 Hours of Moisturized Air, Use With Menthol Scented Vicks VapoPads: Health &. : Crane USA Humidifiers - Ultrasonic Cool Mist Humidifier, Filter- Free, 1 Gallon, for Home Bedroom Baby Nursery and Office, Blue and White: Health & Personal Care