Great for groups and camping, the RapidPure® Purifier+ 9L Gravity System lets you filter and purify a large volume of water quickly and easily. The gravity system features our new POD platform using UltraCeram® and OpenPore technology for protection against viruses, bacteria, parasites, and more. The RapidPure® POD Gravity Purifier Refill Cartridge gives you the power to remove over 99.99% of viruses, bacteria, parasites, and more. Each refill cartridge purifies up to 200 gallons of water. This bundle contains: 1x 9L Gravity Purifier System 2x Gravity Purifier Refill Cartridges