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  • Weighing only 2 oz., the easy-to-use LifeStraw water filter is one of the lightest filters available, and it takes up very little space in your backpack
  • Hollow-fiber filter membrane offers a high flow rate; sip on the straw and it filters the water while it's on the way to your mouth
  • Get down close to the stream or lake and use the LifeStraw to drink straight from the source, or fill your water bottle and insert the filter to start sipping
  • 0.2-micron filter physically removes 99.9999% of all bacteria, such as salmonella, cholera and E.coli; removes 99.9% of all protozoa, such as giardia and cryptosporidium
  • Effectively filters up to 264 gal. (1,000 liters)
  • Regularly blowing through the LifeStraw water filter after drinking helps keep the filter clean and prevents clogging
  • Includes a removable lanyard


View all LifeStraw Straw Water Filters

REI membership


Best Use Backpacking
Filter Type Straw
Filter Medium Hollow-fiber membrane
Removes/Destroys Protozoa and Bacteria
Pump Force Not applicable
Pump Strokes Per Liter Not applicable
Output Not applicable
Housing Material ABS plastic
BPA Free Yes
Field Cleanable Yes
Dimensions 1.2 x 8.8 inches
Weight 2 ounces
Rated 5 out of 5 by from Nearly perfect filter This filter works great. No waiting time like in case of iodine tablets. You can drink directly at the water source and if you want some for later, fill up your nalgene and drink out of it using the lifestraw. It also weighs next to nothing. Lifestraw has become a regular companion on all my escapades. Keep in mind that it does not filter some viruses and chemical contaminants. It filters most of the commonly occurring contaminants though. With the rated capacity of over 250 gallons, it should last long time. Remember to blow out any residual water after every use.
Date published: 2013-08-22
Rated 4 out of 5 by from Works better with integrated bottle I recently bought this with the integrated bottle (purchased elsewhere) for a fishing trip to Labrador. All water at the main camp was filtered, but on day trips guides drank directly from river, while I used the Life Straw. The straw takes a while to get going and works much better with a full bottle. This allows water to passively work itself higher into the straw and requires much less suction. Even under those circumstances it takes a slow long suck to get a mouthful of water. I would hope REI would add the integrated bottle to it's inventory.
Date published: 2014-07-30
Rated 5 out of 5 by from Excellent filter for the money 1000 liters to 0.2 microns is really quite excellent. Read the back of the filters on the shelf, and you'll see most sub-$50 filters do less than 100 liters, and filter to 0.3 microns. That makes this filter do 10x the water, to a much smaller micron level. The difference between 0.3 and 0.2 microns might not sounds like much, but it's a huge difference. When it's brand new ,the filter is dry and it take about 5 strong sucks to get it flowing. Here's a tip- uncap and let it stand up in the water for a minute before sucking on it. Then it flows easily.
Date published: 2013-04-25
Rated 4 out of 5 by from Great backup or drink-as-you go filter I carry this on the outside of my pack and take a few sips of water whenever I come a across a stream or spring, saving the water in the hydration pack. Unfortunately you have to suck very hard through it and you only get a small sip of water every time. The first few "sucks" will yield only air, after which you finally start getting some water. Overall this makes for a very compact, lightweight backup filter that you can take everywhere, especially on trips to destinations with questionable water quality (India, Mexico come to mind).
Date published: 2013-07-08
Rated 5 out of 5 by from Always have this with me! I bought this to have as a spare water filtration device on my PCT hike and it was a lifesaver a few times! It can be awkward to directly drink out of a puddle or stream as you have to lie on the ground so having a container to collect and then drink from makes life much easier. It isn't hard to drink out of once the flow gets going, like many people say, we never had issues in our 90 miles of using. The key is blowing it out after every time you use it, until the water completely drains out! And also, if you can help it, always drink out of clear surface water, this helps prevent the filter from clogging with debris. This is my second year with it and it still flows good. I just bought another for this summer!
Date published: 2017-01-10
Rated 5 out of 5 by from Perfect name for a perfect product I never hike without my Lifestraw. This thing is amazing. You can get clean water from nearly any source. I have found that it is easier to collect a cup of water and drink through the Lifestraw from the cup (than to bend over a water source and suck from there). You can simply generate more suction from a more upright position. Always be sure to blow the water back out- it will keep your Lifestraw going longer. This little guy really cuts down on the amount of water that you have to carry.
Date published: 2013-09-04
Rated 5 out of 5 by from Works well, lightweight and inexpensive I have always used iodine tablets rather than a bulky, heavy filter. I decided to try the LifeStraw because it's so light and inexpensive. I'm sold! It's easy to use and works well. It does take a little suction to get it started, but after that is easy to drink. Remember to blow through the straw to "purge" it before storing.
Date published: 2013-05-15
Rated 5 out of 5 by from Works I am a day hiker, and this is the filter that's perfect for my needs. It minimize amount of water I need to carry, the filter works just like any straw.
Date published: 2013-11-02
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Anybody know if this will make Kathmandu "city" water safe for drinking? More generally, for the typical Nepal water when trekking? Thanks.

Asked by: Duglius
Water at the filling stations is considered safe. I would still suggest using the LifeStraw for added protection. Outside of Kathmandu, the LifeStraw would need to be supplemented with a virus deactivating source. That can be chlorine dioxide, iodine or boiling.
Answered by: REIservice
Date published: 2017-05-29

How do you clean a Lifestraw?

Asked by: killy
When done filtering water, blow out the excess water and shake the unit. Other than wiping the outside down with a wet cloth, there is no other cleaning involved. When it gets hard to pull water through the straw, it is time to replace it.
Answered by: REIservice
Date published: 2017-02-08

can you buy replacement filters?

Asked by: jsg
No, it effectively filters up to 264 gal. (1,000 liters). At that point. the LifeStraw would need to be replaced.
Answered by: REIservice
Date published: 2016-12-16

what is the stable shelf life on this product

Asked by: KoolAde2
The manufacturer, EarthEasy, originally gave a shelf life of five years. However, they have removed the shelf life and now list it as indefinite because the product does not have any active chemicals or moving parts. It will filter about 264 gallons.
Answered by: REIservice
Date published: 2017-02-08

Can you use this with any water bottle? I already have several Camelbacks and hate to buy yet another bottle to use.

Asked by: SpaDiva
The LifeStraw can be used with any source of water and functions just like a straw, so you can drink from any bottle or directly from the source of the water such as a pond or stream.
Answered by: REIservice
Date published: 2017-04-03

What is a LifeStraw's average lifespan?

Asked by: Jared
This straw can filter up to 1,000 liters (264 gallons) of water. If used every day for all of your drinking water, it will last for approximately one year. If only used for travel and outdoor activities it will last much longer.
Answered by: REIservice
Date published: 2017-06-05

Is there anything on it to help keep track of how much water has been filtered?  I imagine it's easy to lose track somewhere between liter 1 and liter 1000.

Asked by: Berkshire Matt
There are no volume measurement increments on the LifeStraw. Something in the way of Nalgene bottle where you can measure ounces and milliliters would be recommended in order to calculate how much water you have filtered through the LifeStraw.
Answered by: REIservice
Date published: 2016-08-30

What about sea water? Will this provide you clean drinkable water if you are stranded at sea? And, can it be recycled?

Asked by: Kat662014
The LifeStraw will remove bacteria and protozoa and turbidity from salty water, but will not remove salt from the water. You would need a desalinator to accomplish this. According to the manufacturer, the LifeStraw can be recycled.
Answered by: REIservice
Date published: 2017-05-29
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