On the water filtration front, one thing I'm curious to know is what happened to the LifeSaver bottle. Was that just the victim of TED hype?

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?