Medisana Ultrasonic Humidifier with 5 Bottles of Eucalyptus Aromatherapy for $19.99 shipped. This humidifier, measures 7″ x 4.5″ x 8.5″, can fit into most suitcases for travel. It has a rotating vapor nozzle, auto-stop, and can run up to 9 hours without refill and humidify a 1,000CF room in 2 hours. Most places have it for $47 and more.