Berkey Light System is great for two people. The Berkey Light System is a lightweight unit designed for use during outdoor activities such as camping, hunting, traveling, and during unexpected emergencies. This Berkey Light System comes standard with 2 Black Berkey Purification Elements but can be expanded up to 4 elements Constructed of a non-BPA/BPS co-polyester, which does not retain or leach any foul odors into your water Storage capacity of about 2.75 gallons (10.4 liters) Maximum filters: 4 Black Berkey Purification Elements (in upper chamber) Includes upper and lower chambers, a base, 2 Black Berkey Purification Elements (expandable to 4), 2 washers, 2 wingnuts, 1 priming button, 1 spigot, 1 cloth lid Height when in use: 21" (when used without base); 26.5" (with base) Weight: 6lbs empty Diameter: 9" For normal everyday use, this system easily serves: 1-5 people Fully configured, this system can serve up to 100-200 people a day, during an emergency Maximum Filtration Flow Rate: Configured with 2 Black Berkey Purification Elements, the Berkey Light System can produce up to 4 gallons (15.2 liters) of purified water per hour Configured with 4 Black Berkey Purification Elements, the Berkey Light System can produce up to 7 gallons (26.5 liters) of purified water per hour Up to 4 Berkey PF-2 Fluoride and Arsenic Reduction Elements may be installed in the lower chamber of this system if desired Berkey Light systems are made and assembled in the USA. *Flow rate calculated with upper chamber full to top. Flow rate decreases as water level declines.