M8 thats an old australian joke years ago if you were working in the paddock or bush you would carry your drinking wanter in a bag made of water proof canvas bag . you would hang the bag in the shade of a tree and the water would be quite coo, or seemed that way , Offen you would see them hanging on the bull bar of a work ute or truck. So the saying . It was 120 degrees in the water bag M8 no bull.