The whole essence of this Hollow Humidifier takes me back to the Apollo 13 movie of Tom Hanks. If you will recall, they had to think of something to diminish the building carbon dioxide levels in their craft. Apparently the Hollow Humidifier seems to cater to the same thing, a humidifier which sports some eco-friendly intent.
It was designed by One Tenth Design and makes use of ordinary plastic bottles filled with water to treat the air. This should be a great solution for people who want clean and healthy breathable air at home or the office.