LifeStraws seem designed to filter biological, not chemical contaminants. "filte...

		fiatmoney on Jan 10, 2014 \| parent \| context \| favorite \| on: West Virginia Officials Warn Not to Use Water Foll... LifeStraws seem designed to filter biological, not chemical contaminants. "filters to 0.2 microns through the use of hollow-fiber membranes" "Does not filter chemicals, salt, viruses, heavy metals, taste"