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I have seen the soft sided Nalgene warp with too hot water. Boiling water will do a number on them. If I use them, I use hot water, but not boiling. Tighten snugly and they will form a vacuum as...

One of the things I like about a water bottle, is that especially in winter because of the cold air my mouth gets dry. A sip of warm water heats and quenches all at once.

Not sure to be honest, I think I leave some airspace.

I do NOT use boiling water. Boiling water behaves very differently. I use hot water. Boiling water can potentially warp the soft nalgenes. I use hot water either in a nalgene or stainless steel...

If you have had 1st aid training and were taught the major pressure points on the body for bleeding, those are the areas where a hot water bottle is most effective.

I use one almost every night...

I put the bottle just below my crotch. If it rides up, I have some great dreams. :laugh:

I do this and it makes a world of difference. I use stainless bottles, put them in my sleeping bag an hour before bed and my down bag is nice and warm when I crawl in. I place the bottle between my...

I use the water bottle method as well to count how much water folks consume when I take them on canoe trips. It is so easy, especially in the heat of summer to get dehydrated. Often people do not...