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?