[gumby]

It’s a legitimate fear as a wet sleeping bag could kill you in the snow, but I’ve ever seen an actual Nalgene bottle fail even when we tried driving a forklift and a bobcat over one. I did crack one with liquid nitrogen but I don’t camp at those temperatures :-).

I’ve been given bottles made from other plastics but I’ve always been dubious about them.

I have cracked the lids, but that takes a lot of work and an aged lid. The lids are made of a different, softer material which is more compliant to make a good seal. I do replace the lids every few years.

Speaking of getting your gear soaked (not): a good habit in the snow is to put a nalgene of water upside down into the leg of each boot overnight to keep them from freezing. I guess you’d be concerned about that too.