The RapidPure® POD Purifier Refill Cartridge gives you the power to remove over 99.99% of viruses, bacteria, parasites, and more. This replacement refill cartridge works with the RapidPure® Purification Straw, Water Bottle, Insulated Bottle, and Multi-POD System. Each refill cartridge purifies up to 75 gallons of water. Compatible with all new product models except the 9L Gravity Purifier System.