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