Originally Posted by WV
Two notes about water, one good, one bad:
I brought a plastic storage tub with a snap-on lid and stood it on end in my vehicle so I could put a 5 gallon bottle of spring water inside. With a couple of hand-warmers in with it and a spare sleeping bag draped over the top of the tub it stayed unfrozen all weekend. I'll use this technique again next year.
I've been using a water bottle in my insulated sock, first to warm the footbox of my quilt and then to keep the water liquid for use the next morning, and a Nalgene Canteen worked well the first night, but shortly after I filled it on Saturday and tucked it into the pocket of my fleece hoodie, I saw water spurting out through the fleece. Fortunately I caught it almost immediately, and it didn't get my clothes wet enough to need to change. It could have been serious if the Nalgene had leaked in my hammock. I had been using Platypus bladders this way with no problems, and I'd stopped using a ziplock bag as an extra layer of protection against leaks. I'll go back to doing it the right way.
Good info on how well the chemical heat packs worked for keeping your water un-froze in a simple, insulated container.
Also, good to know that things can happen like you described w/ your Nalgene bottle.
If you will, maybe you could post pictures of were the Nalgene failed. Also, how hot was the water you put in it? Good stuff to know.
And yeah, unless you are 100% sure about the reliability of your hot water bottle, putting it a back up bag is a good idea. I did not put my nalgene bottles of hot water in back up bags this weekend... just glad I didn't spring a leak like you did