With the Brita Fill & Serve you put a stylish decanter on the table with which you pour filtered water. You use the decanter with a filter disc that removes impurities from the water. On the indicator on the lid you will read exactly when you need to replace the filter. Replace it every 4 weeks, or after 150 liters, for optimum performance. The Brita Fill & Serve only works with Brita filter discs.