The Lifesystems Water Filter Purifier Soft Flask provides fast, reliable water purification in a lightweight, packable format. Disruptor® electro-adsorptive technology removes waterborne viruses, bacteria and protozoa while filtering particulates, chemicals and heavy metals, with fast-flow performance that purifies water as you drink. Available in 500ml and 1000ml sizes, the 500ml flask fits running vests for trail running, while the flexible design packs down small when empty. It can also be used to decant purified water into another container, and each replaceable filter treats up to 250 litres.