Unless traveling, we do not store any food in our vehicles as it is rare that we out of our immediate living area. Even then, if there was ever a need to abandon the vehicle and walk, the longest would no more then 2-3 hours to home.

We do carry water though through all seasons but do not have to think about freezing temps unless we go up north into the interior in the winter. Even then, those small 500 ml to 1L water bottles and Gatorade type bottles can be frozen over and over again without any problems. In our freezer, we have some of these which have been frozen/thawed dozens of times over the years as they are used in place of buying ice for coolers when camping and traveling.