Keith,
At the risk of further thread drift, I have to say that I have one of those Nalgene bottles, and they are not very good. The dirt cap doesn't really seal, and dry dust can find its way in. Also, the nozzle isn't as nice as the ubiquitous Specialized made ones. I bought some more dust-capped bottles from a company called Dawn to Dusk, and while better than the Nalgene, they still are pretty bad. I can't believe, especially with the rise in popularity of unpaved road riding, that there aren't better solutions available.
Chris