The Air-O-Swiss Travel Ultrasonic Cool Mist Humidifier is incredible. It is small enough to fit in a jacket pocket, and its water source comes from any convenience store: a plastic water bottle turned upside down. This device is my favorite pairing with the goLITE. It improves both time to sleep and depth of sleep, not to mention skin and sinus health.
Source: Tim Ferriss, The 4-Hour Body – Engineering The Perfect Night’s Sleep
Amazon.com Price: $40.70 (as of 2015-08-04 15:48:20 GMT)
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The Air-O-Swiss Travel Ultrasonic Cool Mist Humidifier 7146 is a high quality travel-size ultrasonic humidifier which is compact enough to take and use anywhere. The efficient ultrasonic technology uses high-frequency vibrations to generate a micro-fine cool mist, which is blown into the room where it evaporates into the air. Just add your own half-liter water bottle, and plug the unit in anywhere in North America or Europe using the included transcontinental travel AC adapter and exchangeable plugs. Stay healthy and be more productive at home, in your dorm room, or at work. Place the AOS 7146 on your desk, in your office, in your hotel room, or anywhere you need quick and easy added moisture.