If travelling to a different—and dryer—part of the world means you'll be waking up with dry sinuses and bloody noses every morning, a humidifier should be the first thing you pack. But not the giant machine in the corner of your bedroom, this tiny six-inch carry-on friendly plastic bottle from 11+ that's powered by USB.
Using replaceable filter straws, water from the bottle is drawn up into the cap where it's turned into a fine mist that easily evaporates to make your slumber, and your mornings, a little more pleasant. It's certainly a better solution than leaving a hot shower running all night (a friend does it) and you can use your smartphone's power adapter to keep it running, instead of having to travel with yet another wall wart. [11+ via MoCo Loco]