This is more than a “taste good” filter. The Frontier Sport water bottle filter is a serious microbiological grade filter that incorporates Aquamira® Filtration Technology. It is tested and certified to remove >99.9% of Cryptosporidium and Giardia. Activated coconut shell carbon reduces waterborne chemicals, improves the taste of the filtered water and eliminates offensive odors. Easy to Use. The Frontier™ Sport Water Bottle filter converts any water bottle with a straw into a filter bottle that supplies 100 gallons of great tasting, microbiologically safe water at a fraction of the price of bottled water.Using the Frontier Sport is Smart. Aquamira® Filtration Technology is Tested and certified to remove >99.9% of Cryptosporidium and Giardia. Our two stage filtration system incorporates a high density polypropylene fiber prefilter to screen out larger particles, and a highly efficient porous plastic carbon block final filter provides high water flow with low pressure drop. This means you can get plenty of water with out popping your eyes out of their sockets. This new and improved filtration system is so efficient that one cartridge will provide up to 100 gallons of easy to drink filtered water. Activated coconut shell carbon reduces waterborne chemicals, improves the taste of the filtered water and eliminates offensive odors. Miraguard™ antimicrobial technology suppresses the growth of bacteria, algae, fungus, mold and mildew within the filter media. Miraguard™ does not protect users against food borne or disease causing bacteria, viruses, germs or other disease causing organisms.