I'm not a huge user or supporter of bottled water since one bottle takes over 1,000 years to biodegrade in a landfill, and they leak toxic additives into the groundwater. So I'd much rather see everyone using reusable BPA-free, aluminum or stainless steel bottles. Sometimes you may not be able to use your own refillable bottle though, so if you have to purchase a bottle of water, think about buying Give brand.
Not only are the bottles biodegradable, but the water is bottled regionally and delivered to local stores, so that means reduced carbon footprint. And they're called Give for a reason. Depending on the bottle you purchase, you can choose which of the four charities ten cents of bottle's cost will go to support. To see which charities, read more.
Give Hope: To Women With Breast Cancer
Give Strength: To Fight Muscular Disorders
Give Love: To Our Environment
Give Life: To Children in Need
You can find Give water at Whole Foods and other health-food stores, Big Y, Price Chopper, Food Emporium, Scooter's Coffeehouse, and other stores. If you're going to spend $1 on water, it might as well be good for the planet and good for the people on it.