I stopped taking these seriously when I saw salt, which is generally millions of years old unless harvested from the sea, with an expiration date.
The answer was about concern that the plastic bottle imparts impurities in the water that might become harmful after the use-by date.
I'm not sure I'd care about that if I had gone three days without water.
-PJ
“I stopped taking these seriously when I saw salt, which is generally millions of years old unless harvested from the sea, with an expiration date.”
Even though it never actually expires there is a reason they do that. Over time it absorbs moisture from the air and becomes as hard as a rock in one clump. So even though it is still good, it cannot be used as advertised and originally packaged.
They just covering their butts from ignorant complaints about the product after this happens. And you can bet they get these stupid complaints too.