i keep a b o b in my truck . and i am thinking about in the winter how do i keep the water from frezzing and brusting the plactic jug ? it would make a mess of the other things in the bag . i dont want to keep water in a other bag as that gets to be something else to grab. any other ideas . right nown i keep it in a 5 gal bucket 1 32oz and 6 12oz bottles.