People who travel frequently often look for the portable versions of most things. (Myself included.) So, although you might not need a portable humidifier, you might want one for your home, and look for a travel-sized version. The USB-powered MZTDYTL is just such a device and I picked one up to review. You can see my full review terribly named MZTDYTL, which is designed for home, hotel, or car, in the video above.