Nalgene palstic bottles are made in the USA, however their stainless steel models are made in China. This also goes for the Filzer Kewl bottle brands.

The Klean Canteen brand of SS bottles are marketed as designed in the USA..that does not mean they were made there.

Regardless, all three of these brands are comparable in quality and the respective companies have a lot riding on their product reputation so you really cannot go wrong with any of them. Also none of the newer bottle models do not have a plastic liner which hindeer their use for boiling water.

Of the three, the Klean Canteen is more preferable as is the lid comes right off the bottle, meaning it is not held on by a retaining ring to prevent you from inadvertantly losing the lid or have it fall down a 300' cliff... I have seen it happen. With a retaing ring holding the lid on, you would need to be careful that any open flame or heat source does not either deform or melt the lid. However if I was ever in the situation where I had to boil water in my water bottle I would just cut the retainng ring off the bottle.