The Jerrycan 20000UF is a massive filtration system capable of cleaning up dirty river water for a large group of campers, rafters, and climbers. Its carbon filter removes viruses, bacteria, cysts, parasites, chlorine, taste and odor out of 20,000 liters worth of water. The Jerrycan itself can hold 18. 5 liters of water that we can carry from rivers to basecamp with ease. The replaceable filter exceeds NSF P248 compliance standards, and the container is BPA- and BPS-free.