These BRITA MicroDisc Filters feature the latest in water filter technology and are designed to be used with the BRITA Fill&Go filter bottle range and Fill&Serve water servers and carafes. Featuring ActivSelect technology, these MicroDisc water filters reduce chlorine and other bad-tasting impurities, whilst retaining important minerals such as calcium and magnesium. Reduces chlorine, micro particles (such as micro plastics) and other impurities but preserves key minerals such as calcium and magnesium.