The LifeSaver bottle is remarkable but it seems like the filtering process doesn't scale well. Imagine having to use this throughout the day each time you fill up.
My company works w/ a charity in rural India that makes BioSand filters. The filters allow people to clean large amounts of water and then save it in containers for later. 90-95% of the impurities are removed. More info here if curious: http://faucetface.com/pages/1-for-100
http://en.wikipedia.org/wiki/LifeSaver_bottle
http://www.ted.com/talks/michael_pritchard_invents_a_water_f...
From the Wikipedia page: "In 2007, the LifeSaver bottle was tested by the London School of Hygiene & Tropical Medicine and the results found it to completely filter out all bacteria and viruses."
This may be a stupid question, but is that simply nothing remarkable?
Since graphene seems to be the best thing discovered for filtering evaporated water, not liquid water, is the LifeSaver not as great a solution as the TED video makes it out to be, for some reason?