I drink a ton of regular water as well, and it's always tap water, so it's not a replacement at all. And aluminum cans are objectively much better for the environment than plastic bottles, but that doesn't even factor into why I drink it. I mean, I agree that single use containers are bad, but we aren't even close to a position where they are going to be banned, and I could list hundreds of things that should be banned before aluminum cans, so it doesn't really bother me.