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An interesting video presentation–a product aimed at the 3rd world rather than backpacking but it's not hard to envision the application downsized a bit.
Fifteen-nanometer effective filtration would be spectacular performance.
http://www.ted.com/talks/michael_pritchard_invents_a_water_filter.html
Cheers,
Rick
This is pretty amazing really. Instant clean water. I guess it's been around for a couple of years now. But 22 ounces for the 4000. Ouch. I could handle the $150 if it were lighter!
Off topic: TED is one of the most interesting sites on the internet! Always fascinating stuff. Search for Jill Bolte Taylor and watch her presentation on having a stroke. Spellbinding presentation.
Doug
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