Many people attribute their not becoming environmentally friendly to the cost. I agree, to become more environmentally friendly you do have to give a little, but you will get so much back. For instance, a regular bottle of water costs about two dollars. If you buy one a day, estimated to spend forty dollars a month on water alone! Water from the tap costs about a penny. Investing in a kleankanteen (kleankanteen.com) or something similar is well worth it.