The Series II Green Line replaceable filter removes greater than 99.9999% of bacteria, Cryptosporidium, Giardia, chlorine, bad tastes and odors. When heading abroad or to areas prone to viruses, our Series II Red Line replaceable filter offers added virus protection. With the best flow rate (500 ml/minute) of any water filter bottle on the market and an ergonomic design, gaining access to clean drinking water has never been so easy. When you need more than just great tasting drinking water, turn to the newly re-designed Frontier Filtered Water Bottle by Aquamira. Part of the McNett family of brands, Aquamira Technologies Inc. is passionate about water and great at innovative technology. A leader in water treatment systems and purification products, Aquamira provides easy, safe drinking water anywhere. For over three decades, McNett has been providing you with the Essentials for Adventure.