My wife and I go through bottled water pretty quickly. I am thinking about washing the used water bottles and refilling with tap water, just as a water storage means. I understand the dating and rotation aspect involved, and have even read that reusing water bottles can lead to bacterial growth and allegedly the leaching of certain harmful chemicals. Is anyone else doing this? I know that cases of bottled water are cheap, but I (as always) am looking to do this without spending a ton of money.