I use a Nalgene reusable water bottle everyday. It is amazing how many disposable bottles I used to go through. The only problem I had was that it would get smelly. I found the solution! If you clean them w/baking soda all odors are removed. I couldn't image going back to the other bottles now. Plus, I don't have to lug all that water around from the market to the house.
NALGENE | choice