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Title: they are great, but don't let them freeze!
Review: The water tastes good, waaaay better than toxic plasticy water, but you do get a little steely taste because your lips and tongue are touching the steel. The only way to avoid that would be with glass- which obviously doesn't travel as well. I think they are great, but don't let them freeze! I left mine in the cold car with water in it. When it froze- the bottom of the bottle pooched out making it difficult to stand up. I didn't want to try to hammer it back to shape because I thought it might damage the bottle. Somehow, about 3 weeks later, it worked itself back to it's original shape.
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