Why is this weird? You can buy water in glass bottles, plastic bottles and paper containers around the world. Why not in a can with a cool logo/slogan?
Because what sort of weird thing do you have to have going on in your brain that you want your water to be edgy / cringey?
Plus you can't re-seal cans.
On the other hand if they're going to drink a can of something, it might as well be plain water. Much healthier and more environmentally friendly than pretty much anything else you could put in it.
I mean beer is slowly killing us so is technically pretty good for the environment.
If you gave me a choice between a plastic Fiji bottle and a metal can with a badass skull on it, I'm choosing the badass skull. That "weird thing in your brain" is a lifestyle choice, and we make them all the time. How weird is it that someone might choose a translucent purple pen over a plain white pen? It makes no difference really, but some people prefer one over the other.
One example of a "weird thing" is to be a recovering alcoholic who wants to occasionally have a more ornate or interesting non-alcoholic beverage in their hand in social settings.