Im not sure how accurate this is either, but I heard with those straws you can actually drink your own urine. Maybe I was told that just to see if I'd do it. Not sure>
But I do know the "Big Burkee" water filter comes with those straws for camping trips, and the ceramic filters are the best ever invented. Only better thing would be distilling water, and you can use the sun to do that as well if you have a clear plastic bag.
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