PureWater Filters Replacement Water Filter Cartridge for Keurig 2.0 Brewers, Set of 8 Set of 8 charcoal water filter cartridges Enhances water in Keurig 2.0 Brewing Systems For best results, replace every 2 months or 60 tank refills Disposable. Phone support and lifetime warranty provided Keurig, 2.0 and K-Cup are registered trademarks of Keurig Green Mountain, Inc. PureWater Filters is not affiliated with Keurig Green Mountain, Inc.