Some people think that chemicals can leach out of the plastic bottles, but that depends upon how long the water has been sitting in them. It will also get expensive, because you will be drinking a LOT of water on the program that I recommend. The best way to go, is to get a water filter for home use. Before you buy anything, see what your local discount hardware store has in stock. The minimum purification system would be a particle-filter and an activated charcoal or carbon filter.
Water molecules form clusters of varying sizes.
Most water has large clusters, and when people drink it, they soon often get a bloated feeling, because the water is absorbed very slowly. First, it breaks the water clusters down in size, and they can easily enter the cells of the body. This is enormously important when you are undergoing a detoxification process, as you probably soon will. The second thing the machine does is to add electrons to the water which helps neutralize free radicals in the body. The lower the number, the more electrons there are, and the better it is.