EACB Studies. As promoting the Co-operative banks business model is one of our mission, the EACB is supporting the research on co-operative banking by being a partner to the researchers, or by publishing its own studies. Since 2013, we also stimulate the research with our Award for young researchers on co-operative banks.
The water can go stale, too. All companies that produce consumables must, by federal law, have an expiration date on it. Since bottled water is a consumable the company must put a expiration date on it.  Also some water becomes impure due to plastic melting or substances released into the water by the plastic.
1 It's used to kill germs, but creates complications by adding too many free-radicals - more than what is healthy for the body.  Safety of bottled water vs tap water: The result is that most brands of bottled water are void of healthy minerals, have no electrolytes, and are acidic. An extra problem is that water wants minerals in it and it will dissolve more minerals as soon as it can.