New topic for me that doesn't involve border towns! This one is more of a general topic anyhow. As a Cub Scout/Boy Scout parent, there is lots of cold weather camping. We'll be doing a fair amount in the camper as well in the coming months. For the Northerners among us I should clarify and say "cold weather camping" means nights might reach 30 degrees - I'm a Native Texan from Houston, so I'm a weather wimp. Has anyone ever made their own hot water bottles using a cheap bottle? I could buy new shiny hot water bottles, but I like the idea of using an old Powerade bottle or something to toss in the bottom of the sleeping bags to get it warmed up. I've done some googling, but haven't really found anything other than the same repeated tip about a particular brand name bottle that would cost more than a new rubber hot water bottle and cover. Any neat suggestions out there about hot water (or coffee) in a metal bottle wrapped in a sock or perhaps a Powerade bottle with hot water?