This 24 oz BPA free filtration bottle is ideal for emergencies or to just take with you to enjoy fresh water anywhere! Using proprietary Ionic Adsorption Micron Filtration System this bottle can filter up to 100 gallons of water (620 fills) by removing 99. 99% of pollutants and contaminants found in drinking water sources. The top cap has a soft plastic removable cover for drinking soup which keeps it free of dirt and contamination. 24 oz size is compact, light weight and easy to pack. Tested by independent laboratories using EPA and NSF protocols.