LifeStraw Peak Series Solo Water Filter – Mountain BlueThe LifeStraw Peak Series Solo Water Filter Mountain Blue is an ultralight, compact portable water filter designed to protect against bacteria, parasites, microplastics, silt, sand, and cloudiness. At only 1. 7 oz and 5. 1 inches tall, it is built for easy carry and on the go filtration. The filter features standard 28mm PCO threads, allowing it to screw onto standard water bottles. It has a 3L min flow rate and can fill a 1L bottle in 20 seconds.