The Life Straw

I don't know how many of you have seen or heard about the "Life Straw". It came to my attention from again....Relevant magazine (sigh) and so I checked out the site. This is a Danish company and they have created this straw...that filters out harmful bacteria and germs. I am wondering why it took so long? How complicated can it be? It sells for about $3, and can purify water for a year or 185 gallons. How many litres is that? Anywhooo ..... amazing and simple. Ok, check out Relevant as well.