I only carry water with me very rarely. like only when I go on long hikes. Even then, the spring water on those hikes is pretty good. I probably use a drinking bottle less than once a month.

Besides aluminium leads to oxidative stress. There's a reason you don't see aluminium cookware in the shops.

I had a little silver glass handed down as a child. Used it only for water. Don't think that kind of thing can be afforded nowadays.

What's the problem with Ag?