I agree that I am not sure how often you can use a nalgene in this fashion before it fails. I would certainly not recommend using this method as a common practice, but in a pinch, I'd drink the water. The amount of bad stuff coming out of the lexan should be low enough for brief exposure.

It is interesting that the same container that I used has written on it that it is microwave safe, which would imply that it can be used to boil water in a microwave. I haven't tried that, but I am sure it would work. I'm not sure why anyone would need to do that though, since if you have a microwave you probably have access to better cooking container choices.

Try and stay cool out there!

Greg