09/17/2013 02:30 pm ET Updated Nov 17, 2013

David Henrie and Drake Bell Are Living on Just 4 Liters of Water a Day (VIDEO)

It might get a little smelly in Hollywood for a few days in October.

David Henrie and Drake Bell (video voice-over) are taking The 4Liter Challenge, a campaign daring Americans to live on just four liters of water a day for up to five days. Participants will use their four liters for everything -- drinking, cooking, cleaning and bathing. They'll share the experience online with pictures, videos and tweets... raising funds to build clean water projects worldwide. The challenge starts October 14th.

People like David and Drake will post awkward or insightful moments from their challenges on -- mornings without a shower, mealtimes without pasta, and what about the toilet?

Americans use more water than any other group, up to 550 liters per person, per day. But nearly a billion people live on just four liters or less, the minimum amount humans need to survive. 4Liters is meant to change the way people think about water, by allowing them to live water poverty and bring clean water to communities in need.

You can sign up and join them by visiting