I just returned from my local Wal-Mart where I purchased the Sawyer Squeeze Water Filtration System for less than $25.00. Removes 7 log (99.99999%) of all bacteria and 6 log (99.9999%) of all protozoa. Comes with a squeeze bag and attachment to fit on most common drinking water bottles. Great product. - Bill K.
JWR Replies: I should mention that the Sawyer brand filters are also sold by several SurvivalBlog advertisers. Be sure to do some comparison shopping before you buy.