[huherto]

http://www.csgnetwork.com/waterusagecalc.html

600 Gallons per day * 3.7 = 2,271 liters per day. That is just water without counting the water used to grow the food we use.

Meanwhile 4,000,000 liters can be benefit 4,000,000 people that drink 1 liter of bottled water a day.

Drinking water is as efficient use of water as it is possible. I rather drink from the faucet if possible but lots of people prefer bottle water.