The AIR-O-SWISS Travel Ultrasonic Humidifier ($49.99) is a must have for your next hotel stay, your office or for use by your bedside at home. Simply add your own half-liter bottle of water, and plug the unit in anywhere and within seconds you’ll be enjoying a micro-fine cool mist that evaporates into the air. The unit is whisper quiet and extremely compact. It comes complete with a handy travel pouch, as well as a travel AC adapter and exchangeable plugs that can be used in North America or Europe. The bottle neck adapter has two size fittings for use with standard plastic water bottles. The adapter fits securely inside the neck of the bottle so water does not leak out. When turned upside down, the metal ball stopper is water tight. The base has adjustable fold out feet to alleviate tipping. In addition, the unit has a variable humidity adjustment to accommodate the amount of mist that is released. We used this travel humidifier on a recent trip to California and Nevada. The tiny unit made our room feel moist and comfortable. The Air-O-Swiss Travel Humidifier is the perfect anywhere option for anyone looking to quickly and easily add moisture to the air. (Reviewed by Meredith Fire-Hess)