A perfect solution for backpacking or group camping trips, the Katadyn Gravity BeFree Water Filtration System 3.0L is a lightweight, easy-to-use method for safely filtering water. It weighs just 7 ounces, packs down small, and filters up to 2 quarts per minute! Eliminating the need for hoses or separate containers, the system integrates a 0.1 micron microfilter directly into the cap to remove bacteria and cysts, including Giardia and Cryptosporidium. No pumping is required and there's no need to allow time for purification to occur.