I got htis from a preppers site:
How to store water in car in freezing temps? - Survivalist Forum
"Don't store water, store a sports drink like Gatoraid.
I keep Gatoraid in all my vechicles and so far it has not frozen even when I leave them
out side all night with temps in the tens.
Not only is it a source of fluids it is also a source of calories, something you will need if you are stuck in your car in a blizzard.
Your will need the electrolytes as well if you will be on foot."
G2 does not have sugar in it or even fake sugar. It might have salts but not much, the Sobe water I have on my desk has 55 mg salt.