sometimes water is carbonated. carbonation gets flat after time...
Yes, but they're also on non-carbonated water. So why?
other times it has minerals added.
And are these minerals degrading in some fashion? Does the water lose that freshly-dissolved calcium taste over time? I'm not just mocking the idea, I'm genuinely asking.
in either case, these cases are all glass bottled water, so plastic isn't the issue.
But plastic bottles have dates too. Why? Or if plastic bottles do for some reason related to plastic, why does non-carbonated water in glass have expiration dates?
other times, maybe its ust good policy not to drink something that hasn't moved in 8 years?
Why? We not only drink but prize many forms of alcohol that old, many of them sealed much less securely (with corks) than these bottles of water.
I am having a hard time here seeing any real reason for this as opposed to an irrational sense that EVERYTHING you eat or drink must expire or go bad, somehow, someday. (Abetted, no doubt, by lawyers covering the butts of companies against something that MIGHT happen to the water after 40 years, since we haven't tested 40-year-old water and can therefore say with certainty that it's safe.) I can't help but feel that it's about as logical as saying not to build a building with granite's that gone bad.