Where there is no or no sufficient supply of fresh or drinking water, nor motorised vehicles to distribute it, water distribution is human-powered. Human-powered water distribution refers to the use of jerry cans and small recipients to fetch water from a centralised distribution point (e.g. river, lake, borehole, shallow well). Either people collect and transport the water themselves or they buy it from mobile vendors that often use small barrels on wheels to transport the water and sell it door-to-door. The effort of ensuring water supply can be high for single families or communities and its price is often higher than that of a well managed public piped distribution system.