I recently heard you speak at a lunch in Atherton, and have made a lot of "green" changes, one of which is to stop giving my kids plastic bottled water in their lunches. I bought new small water bottles at REI for them, which I plan to put filtered tap water into for their drink w/lunch, but ALL the water bottles sold at REI in that size had a #7 plastic on the bottom. You mentioned that was one of the bad plastics. If I don't microwave or put in dishwasher, but just hand-wash the bottles, is there any health risk associated with giving my kids water in them every day?? Is there any possibility anything harmful would leach out into the water? Thanks.