I quite commonly see Nalgene bottles or aluminum bottles being used today. My question is, are there any water bottles or canteens currently in production that can be used to collect water and boil it. I know technically you can boil water in plastic bottles but it takes much longer and you have to be extremely careful and attentive which is a drag. I'm guessing it would have to be stainless steel??? Not sure if aluminum bottles are safe to boil water in and what not. Any information would be greatly appreciated.