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I have a question about storing water when on a camping trip or on a multi-day hike. I'm hoping you can help me to determine whether or not this question is on topic for the site:

How long can I trust the purity of water in a water bottle?

In the morning on day 1 of my multi-day hike I opened up a one liter plastic bottle of water and drank half the contents. I stored the bottle in a loop on the outside of my pack and promptly forgot about it. On day 3, sweating and thirsty I remembered the water bottle, but I worried that I might get an upset stomach if I drank the water.

Was I right to be worried? How long can I trust the purity of water in a water bottle after it has been opened and exposed to a person's mouth?


I'm hopeful that this question is on topic for the site. I've searched online for an answer to this question, and I've searched the stack, but I haven't been able to find an answer anywhere. What are your thoughts? Would this question be a good fit for The Great Outdoors?

  • 2
    Yes, it would be a good fit. As for the germs because you drank from it, they are your germs. If you are worried, you can wipe the mouth of the bottle. – ab2 Apr 27 '18 at 23:57
  • It might be a better fit on health. I have bottle next to my bed I have used for weeks. I – paparazzo Apr 30 '18 at 12:47

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