i don't like that "going green" has become trendy, because i think that can be more harmful that helpful to the cause it is aiming at. however, there really shouldn't be anyone left using throw-away bpa plastic bottles. it's bad for your health and the health of your surroundings. i recently purchased a bobble bottle, which has a built in filter you change every 300 uses (for those of you who don't believe that most tap water is just fine for you). i love it, and it is one of the most effortless ways to cut your waste.