Food and water!

I carry the majority of my survival gear in my trunk, as I'm rarely found very far from my car. I also happen to live in the Midwest, which means my gear experiences some fairly radical temperature swings...from the broiling heat of summer to the veritable deep freeze of winter. So my questions are simply this: How well do MREs stand up to such temperature extremes? Will they survive being frozen, thawed, and refrozen again, or is that simply asking for trouble? Also, what's the best way to store water? I had several 1 gallon jugs of water in the car, but our recent frost convinced me to bring them back inside for the time being. I considered dumping some of the water out of each jug in order to provide a little room for ice expansion, but I'm not sure I trust those cheap plastic jugs that much. Are the little survival water packages durable enough to stand a solid freeze, or is that questionable too? I'd be interested in hearing some thoughts and/or suggestions on these issues! <img src="images/graemlins/confused.gif" alt="" />