If you're already a fan of Japanese design house ±0's donut-shaped humidifier, the third iteration offers even more reason to love it. Keeping the clean, award-winning design that attracted all the attention in the first place, the device is also still compact (12 inches wide) and filters water. The key update is an added mist setting that more than doubles the time between refillings. With added functionality, the ±0 Humidifier is now an even better way to add moisture to the air than normal unsightly and oversize varieties. It's available in pink, blue, beige, brown and white from Dynamism or Compact Impact.