I have a couple Nalgene bottles 2/3ds full of water so they won't burst although nalgene bottles are supposed to be able to handle freezing. I really like those little survival candles ,a couple of them can keep a car warm all night. The only problem is I had some melt this summer.
Here is my fave camping mess kit. I replaced the old canteen for a new German one but the tin cup is really impressive. You can cook in it ,boil water and the handles can be held with bare hands. This all fits together in the case that can be worn on the belt or pack.
Here is another great tool for any BOB or car/truck kit.
Remember you can go almost 3 weeks without food but will freeze to death in hours without proper clothing/shelter and not much longer without water.
The wool insulated parka is a great idea. I love wool it is the best insulator
I usually have a modern shell and old style wool sweater.