The best alternative to tap water is in-home water filtration. With an in-home water filter you can have better than bottled water quality for under 10¢ a gallon. Fill a reusable water bottle from your filter and your are good to go!!
Filters – If you are thinking about getting a filter for your home, there are several things to consider. First, make sure you get a filter that removes the contaminants of concern in your tap water (see Local Drinking Water Information). Second, be sure the filter is independently certified by NSF (or a similar independent organization) to remove the contaminants of concern in your tap water (if any). Third, maintain the filter at least as often as the manufacturer recommends.
There are many options for in-home filtration systems. See Bottled Water Blues for some suggestions. And, you can pay for your in-home filter system with all the money you will save by reducing or eliminating your bottled water purchases!!
Reusable Water Bottles - Want to do something good for the environment and for your health? Instead of buying bottled water, which is a big waste of resources, try filling a reusable water bottle from your tap or filter. Here is a list of reusable water bottles:
Also, check out this post from ecofaulous!
Where to buy? There are lots of places you can buy them. REI.com has a good selection. Or, better yet, check out your local sporting goods store and support a business in your community!