Here's a link to Nalgene home page showing various bottles including their new OTG (On The Go) Nalgene bottle.

http://www.nalgene-outdoor.com/

My son works in the lab of a big hospital and he brought me two 32oz bottles that contained Reagent Grade Water. The quality is unbelieveable and they THROW THEM AWAY. If you know anyone in a hospital lab, ask them to save you a few. They are white with a plastic top of great quality. You couldn't buy one this good commercially. They may be Nalgene for all I know. They are super quality and super strong. I'm sure they must also have other bottles of varying sizes which are equally good. Be sure that the contents are safe for reusing for drinking water.