Enjoy the taste of BRITA freshly filtered water. The BRITA MicroDisc with ActiveSelect technology effectively reduces chlorine, other taste impairing substances and fine solids that affect taste. It uses millions of pores which securely locking away taste impairing substances, but leaving in all the valuable minerals such as magnesium and calcium in the water. The MicroDisc is made from compressed natural carbon coming from coconut shells. These filter discs provide great tasting water for longer. The one MicroDisc lasts for approximately four weeks.