Ok, so the post title is a bit dramatic, but for someone who plans to hit the road without refrigeration, and having always lived in the Northeast.... if I am in AZ in the summer by chance, and I have my water bottle out of direct sunlight, perhaps under a blanket or two... and I go to grab a drink, how hot is that sucker going to be? I don't really need an "ice cold drink" but I never thought of the other end of the spectrum. I really don't want to be drinking bath water either. Thx.