Soft Mist - The Portable HumidifierSoft Mist Portable Humidifier. Create soft mist with this doughnut shape humidifier. It is very simple to run, just get a cup of tap water either plain or add a drop or two of your favorite aroma and then drop the ring in the water. Now plug it in to the USB outlet and start enjoying crisp clean air around you almost instantly. Good for dry atmosphere and can help relieve you from many symptoms of allergic reaction. Soft Mist can also help you breathe