Super Mini Humidifier, one sub-miniature donut-shaped that floats on water,easy carry away with USB port. It is also can be used as aroma diffuser! No fixed water tank, no filter, so easy to clean and even prevent bacteria, No other wheres you can find such super-convenient Humidifier aroma diffuser.
Put it on water with the waterinlet side(please notice to keep the water out of the other side).
It is better to go with big edge cup,small cup may affect the fog effect.