Today you are more thrifty and conservative than usual. Put this attitude to good use by breaking the water bottle habit once and for all. According to food and water watch, the national average cost for a gallon of tap water in the u. S. Is. 002 cents, whereas a gallon of bottled water ranges between. 89 cents to 8 bucks. The quality of water between bottled and tap is often the same. Packaging and shipping bottled water has a tremendous effect on the environment. Do your part by drinking tap.