Compatible with all BRITA jugs, including those with 'PerfectFit' feature (Aluna, Marella, Style), these filter cartridges provide you with fresh great tasting water, without the waste of bottled water for just a few pence per litre. This filter cartridges include; Micro Carbon Pearls that reduce chlorine and impurities for improved taste and appearance of food and drinks and Ion Exchange Pearls that permanently absorb lead and copper and reduce limescale, for appliance protection. These cartridges are recommended by the UK Tea Academy and by consumers - 96% agree tea is more brilliant with MAXTRA+ filtered water. The MAXTRA+  filter cartridges last approximately 4 weeks and are recyclable.