h20 validity

if you have pure RO water in a glass bottle.. how long is it good? does it have an expiry date?
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If the glass bottle has an airtight seal, then it should be good forever.
If the bottle isn't sealed, then some molecules could get in ruining the point of the whole RO thing but there's no set time limit. It just depends on how easy it is for that stuff to get it.

In general, the water should be fine forever in the glass bottle anyway. There aren't any bacteria that eat water, so it never goes bad anyway. If it's in glass, then it won't even get that old plasticy taste that it gets from plastic bottles.

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>>  if you have pure RO water in a glass bottle

How do you know that the water is pure?
How pure do you think it is?
How pure does it have to be?

How clean are the glass bottles?  Have they been sterilized?

How do you get the water into the bottles?  
Is there any chance of airborne contamination?
How do you clean the pipes, funnels, and hoses used in the transfer?

I set up a water dispenser at my job several years ago.
The sort of thing where you go through two or three 5 gallon bottles of water every week.
The dispenser and the stock of bottles were kept in a sunny conference room.
I wasn't always careful about using the older bottles first.  Some of them got stuck in the corner.
After 6 months they grew a green algae-like mold.  Not very appealing.
25112Author Commented:
thanks for the variables..
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