Features: PROTECTS AGAINST bacteria (including E.coli and Salmonella), parasites (including Giardia and Cryptosporidium), and microplastics ULTRALIGHT + LONG-LASTING: only 1.7oz; membrane microfilter lasts up to 2,000 liters HIGHLY VERSATILE: Screws on to standard water bottles? AST FLOW RATE: 3L/min - fill up a 1L bottle in just 20 seconds DURABLE AND SUSTAINABLE MATERIALS: made with premium, durable 50% post-consumer recycled BPA free plastic Includes: leak-proof top and bottom cap, custom threaded backwash syringe + user manual LifeStraw is proud to be a B Corp and Climate Neutral Certified brand For every purchase, a child in need receives safe drinking water for a year Includes: Solo water filter includes top and bottom caps for leakproof storage Backwash syringe included