The filter can filter up to 4,000 liters of water during its lifetime, which is enough to last a person several weeks or months in a survival situation.
The LifeStraw is also easy to use, just place the straw in a stream or lake and suck the water through the straw to filter it. This filter makes it possible to drink clean, safe water in any situation, without the need for boiling or other methods. It's an essential item for any survival kit and will make sure you have access to safe drinking water in any situation.