When I read your post, I just had to tell you what I heard on the news the other day. They were talking about plastic drinking bottles and they said that most of us just keep refilling them. They were testing for bacteria in the bottles and found lots and lots. They said the best way to clean the bottles is to just wash them with soap and water, and make sure to let them get completely dry. I was kind of amazed when I heard all this. I would not even think of it. I know if I was using these drinking bottles I would just keep refilling them and not wash them. Just wanted to tell you.