LifeStraw

[2] In addition to these portable filters, the manufacturer produces high-volume purifiers powered by gravity that also remove viruses.

The device is now used as a tool for survivalists and outdoor enthusiasts in addition to being used to help combat clean water scarcity worldwide.

Contrary to popular belief, the original device does not incorporate a reverse-osmosis membrane nor is it able to filter out salts or minerals.

[6] The company funds a retail give back program that as of 2018 has provided safe water to more than 1 million school children in rural Kenya.

The entire process is powered by suction, similar to using a conventional drinking straw, and filters up to 4,000 litres (1,100 US gal) of water.