My bottle water only costs me $2.99 about every 2 weeks, so it really isn't expensive. Personally, I can't stand the taste of any tap water that is filtered and you wouldn't be able to either if you tasted my water. Its great for cooking, but I would never drink it. Also, our water is regulated by rainfall and snow melting, so it isn't always reliable. When we get too much rain it turns brown and too little rain means we have to conserve. We have had bottled water now for about 10 years and I would never think of changing to something else, especially since I drink about 20-30 glasses a day.