Use the bottle and filters every day or on the go while camping or on missionary work. It filters out all the "bad" stuff. How Our PURITII Filter Works? A TECHNOLOGICAL BREAKTHROUGH IN FILTER DESIGN Many filters on the market target biological, chemical or emerging contaminants but they rarely filter out all three. The Puritii Water Filter uses a proven, proprietary two-part filtration process to filter out biological, chemical and emerging contaminants. Puritii Products PDF with Full Details - Click Here See our special Price Here!