Keep your Keurig 2.0 brewing system running smoothly with this set of replacement water filter cartridges for Keurig 2.0. Made from charcoal, they are specifically designed to enhance the water in your Keurig 2.0 brewing systems. To use, simply place a cartridge into the water filter assembly and insert into your water reservoir. Packaged in a set of eight, these water filter cartridges should be replaced every two months or 60 tank refills. 8 Replacement Cartridges. Keurig®, 2.0® and K-Cup® are registered trademarks of Keurig Green Mountain, Inc. PureWater Filters is not affiliated with Keurig Green Mountain, Inc.