The curvy, donut-shaped humidifier from Japanese design house +-0 efficiently solves dry winter air, and looks damn good while it does it. The Naoto Fukasawa design features a removable water tank with convenient foldable handle. You can also put few drops of your favorite aromatic oil and aroma will spread with the steam. Once the water is gone, the PlusMinusZero humidifier shuts automatically off. Slick.