As far as BPA, I don't see it as a problem. The FDA has said it's fine (I think). I don't think it is an issue unless you are heating beer cans. Which is funny, because some ultralight backpackers use old beer cans as lightweight pots to cook their meals while camping. Of course, I think there may be a problem with storing beer in a can for long periods. Glass bottles are probably better for beers that you would put away in a cellar. My favorite part about cans: a 6 pack of cans is lighter and more friendly for transporting via bicycle! Edit: http://www.npr.org/2012/03/30/149668771/how-much-bpa-exposure-is-dangerous That's an interesting link. A study showing that the body doesn't absorb BPA very readily.