Iron Willhite
FNG
Also, get a CapCap lid if you DO use a nalegene and don't already have one...it's much easier to drink from and eliminates you touching any contaminated water on the rim of the Nalgene if you fill it directly from the stream.
humangear capCAP Water Bottle Top | REI Co-op
Retrofit your Nalgene, CamelBak or other wide-mouth bottle with the humangear capCap and enjoy easy spill-free drinking.
www.rei.com