The SS bottles are no doubt the right metal container to ensure water safety in avoiding metal contaminates. But I would like to see if I could get some input on aluminum water bottles. I realize that aluminum pots have been cited by a number of research type efforts and have concluded that cooking in aluminum pots may cause alzheimers and maybe some other ailments. But what if they are just used to hold water and not heat it up? If the bottle is only used for the typical canteen purposes, what's the harm? There are a lot of aluminum canteens including Boy Scout, GI, foreign surplus canteens, etc. that have been made of aluminum. Are they all out as a result of cooking in aluminum fears?