Just get yourself a decent glass bottle and fill it with tap water (assuming the tap water where you live is drinkable, otherwise, use a purifier or whatever the recommended way of getting water is).
Healthier, cheaper, better for the environment.
No , it depends because the date on the water bottle isnt about the water but the bottle itself
I don’t think that’s correct. It seems there’s a low risk of some chemicals leaching into the contents of a plastic bottle over time - if this concerns you, it’s a concern when you keep water in a plastic bottle for a long time, not that the bottle becomes more likely to leach chemicals once it reaches a certain age.
There is the other question of microplastics - these are more likely to be found in water from a water bottling factory that uses plastic than from your tap.
The date on water bottles its about the bottle not the water, water doesnt have expiration date