GA Home Cook
Sous Chef
From a chemist's point of view, I use a BPH free bottle to keep my water in. I wash it every day and allow it to air dry before putting the lid on. Why take the chance? The growth of micro organisms grow faster in a clean water environment, when they are no preservatives present. In our business we are very sensitive to micro organisms inthe production of shampoo, body wash and other water containing products. We NEVER use charcoal type filters, which remove the preservative in water. These are always loaded with microbs within a few houra of use. Because of this reason I would avoid filters the "clean and purify water". Especially the type you pour water through and then let it sit to "filter". In most cases these microbs will clean your colon at worst. But there are some that will grow (gram negatives) that can cause some ugly things. Additionally the nastiest part of your body can be your mouth. So using a bottle over several days would not be recommended.