>>1899144>No. What you listed is theoretical, and has never happened in recorded man kin
this lmao>>1897465>>Nalgene can crack or shatter from sudden temperature changes>>boiling or near-boiling water is dangerously hot and can burn the shit out of you even if the bottle doesn't leak>>loses warmth rapidly
lolno wtf none of these are real reasons have you ever gone winter camping or hiking before? none of what you listed happens with nalgenes, and they're the best for handling hot water for the weight
I'm this poster >>1897157
and the only legitimate risk I've seen before of using a hot water bottle in your sleeping bag is if you have ice in your threads and it melts.
If you've been hiking all day and the water freezes around the threads, you might think like you're tightening it properly. But once you pour hot water into the bottle, it slowly melts the ice, and then the cap gets loose, spilling it everywhere. If you're careful clearing the ice away each time it's not a problem, but I've seen it happen before when people get careless and it leaks into their backpack. So I personally I don't take the risk putting it into my sleeping bag if i'm going solo and the trailhead is several miles away