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.
Storing the water in temperatures of 35 to 50 degrees F will extend the shelf life, while freezing the water will help it last almost indefinitely. Make sure you leave about 2 inches of air space at the top of the bottle to allow for the water to expand as it freezes.