Drink filtered tap water instead of bottled water. Not only is filtered tap water healthier for your body and better for the environment (refer to Green FAQ), it is a lot cheaper. The average cost of a water bottle is about a dollar or more, and the price of tap water in a bottle amount is a tiny fraction of the price. If you think tap water “tastes weird,” keep drinking it and I promise you will get used to it. I used to feel the same way about tap water and now I think bottle water tastes flat and is not refreshing whatsoever. Buy a Brita water filter and keep that in your home. It will generally be under $20 depending on what size you get and within about twenty uses it will pay itself off. Talk about a real money saver!
If you would like to learn more about the negative effects of bottled water, I suggest you watch the documentary Tapped. It is a great movie about water corporations stealing water from natural sources and bottling it up with more chemicals in it than there were before. That water that is in your bottled water is what is coming directly out of your tap. Companies just like to rip you off and make you pay for something that is right in front of you. Water is a human right. Why pay for it?