The ZeroWater Pitcher features a filter cartridge that removes contaminants that cause water to have an unpleasant taste. An independently made TDS Meter gives you peace of mind that your ZeroWater filter cartridges are working properly. It also lets you know when to replace the filters. When your water starts reading 006 its time for a change. The one-chamber ZeroWater Pitcher with lid has a pour spout, exclusive in-fridge push button dispenser, and a special storage compartment for the TDS Meter. This ZeroWater Pitcher offers more complete filtration than ordinary carbon filters.