LifeStraw Flex with Collapsible Squeeze Bottle

Ultralight, versatile and long-lasting filter with expanded protection and collapsible squeeze bottle for outdoor sports, travel, survival and emergencies.


LifeStraw Flex with Collapsible Squeeze Bottle

LifeStraw Flex with soft bottle is rated 4.2 out of 5 by 43.


Ultralight, versatile and long-lasting filter with expanded protection and collapsible squeeze bottle for outdoor sports, travel, survival and emergencies.

    • Next level protection against heavy metals including lead as well as bacteria, parasites, microplastics, and organic chemical matter like pesticides, and herbicides
    • Versatile, multi-use water filter system. It can be used in 5 ways
    • Compact and ultralight 3.15oz (0.20 lbs)
    • Long lifetime: microbiological cartridge lasts 500 gallons (more than 1.5 years of drinking water). Replaceable carbon filter lasts 25 gallons (more than 3 months of drinking water)
    • This product gives back: one product, one school child, one year of clean water

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Works for every adventure from international travel to the back-country

The next generation of the award-winning LifeStraw personal water filter. Besides water for drinking, the 22-ounce soft-touch bottle lets you draw filtered water for uses like tooth-brushing and hand-washing.

The ultimate survival tool

The next generation of the LifeStraw personal water filter now with expanded protection against heavy metals including lead, organic chemical matter, bacteria and parasites. Stay safe.

  • How it Works
  • Specs
  • Data & Evidence

How it Works

How It Works

The next generation of the award winning LifeStraw personal water filter, the LifeStraw Flex provides added versatility and protection while continuing to be extremely lightweight and long-lasting. The 2-stage filter protects against bacteria, parasites, and microplastics while also expanding protection against lead and some chemicals. The product is ideal for hiking, camping, and emergency preparedness/survival. It includes a collapsible squeeze bottle.

Stage 1: The membrane microfilter removes:

• 99.999999% of bacteria (E. coli)

• 99.999% of parasites (Giardia, Cryptosporidium, etc.)

• 99.999% of microplastics

Stage 2: The activated carbon capsule reduces:

• Lead and other heavy metals

• Chlorine

• Bad odor and taste

• Organic chemical matter





  • Kit includes: LifeStraw Flex filter, 22 oz soft bottle and backwashing syringe for cleaning
  • Filtration technology: Membrane microfilter (0.2 microns) paired with a carbon fiber filter
  • Microbiological filter capacity: 500 gallons (2,000 liters). Pores clog over time as the filter is used; reaching end of life when water cannot pass through
  • Carbon filter capacity: 25 gallons (100 liters). With frequent use, recommended to change fitler every 3 months
  • Soft bottle material: TPU
  • Soft bottle capacity: 22 fl oz
  • Soft bottle size: 10.6” x 3.85”
  • Filter size: 6.42” x 1.49”
  • Product weight with soft bottle: 3.15 oz (0.20 lbs)
  • BPA Free
  • Recyclable
  • Replaceable membrane microfilter and carbon filters available


  • Can be used as a straw or in the soft bottle provided.
  • Fits most standard size hydration bladders. Using the LifeStraw Flex in-line with a hydration bladder is done by cutting the hose at the mouthpiece or midway. See how
  • Fits many gravity systems on the market that use a standard tube size. LifeStraw Flex is fits into the base of the tube connecting the bag to the filter. See how: (insert link to article)
  • LifeStraw Flex with a gravity bag and hose (instead of a soft bottle) is sold separately or you can purchase just the gravity bag and hose if you want to add it to your LifeStraw Flex with soft collapsible bottle kit.


Lab Information

We believe that responsible manufacturing includes creating and maintaining a strong evidence base for our product claims and their intended impacts. All products undergo rigorous independent testing to meet or exceed protocols established by the US Environmental Protection Agency (EPA) and National Sanitation Foundation (NSF) We also built and run an ISO accredited water laboratory based in Vietnam that does quality validation and testing of all of our new and existing products.

  • Membrane microfilter: 0.2 micron pore size. Removes 99.999999% of bacteria, 99.999% of parasites, and 99.999% of microplastics
  • Also removes silt, sand, and cloudiness
  • Carbon fiber filter: Improves taste while reducing lead and other heavy metals, chlorine, and organic chemical matter such as pesticides, herbicides, and volatile organic compounds (VOCs)
  • Meets US EPA drinking water standards for bacteria and protozoa reduction
  • Meets NSF/ANSI Standard 42 for chlorine reduction, bad taste, odor
  • Meets NSF/ANSI Standard 53 for lead reduction
  • Membrane microfilter lifetime: 500 gallons (2,000 liters)
  • Carbon filter lifetime: 25 gallons (100 liters)
  • Filtration powered by: suction (as a straw or in-line), pressure (in the squeezable bottle), gravity (when paired with a gravity system).
  • Flow Rate: 0.9 liters/minute
  •  EPA Est. No. 95395-KOR-1
  • WARNING: Cancer and reproductive harm. Learn more


Rated 5 out of 5 by from Turned this indoor cat on to the outdoors! Let's just say I'm not an outdoorsy person. But I was invited on a long hike with VERY outdoorsy pals who all happen to own - and love - their own LifeStraws, so I got one for myself too. I watched them drink from a stream that I was initially not thrilled about but they assured me they've used these LifeStraws many times over the past couple years with only great results. So I followed suit, and used the product to drink with the comfort of knowing this is a trusted product. I was shocked to find the water tasted great and clean - and very normal! Happy to have a product that has helped me be more comfortable in the wilderness.
Date published: 2018-10-31
Rated 5 out of 5 by from Life saver when water is not readily available. I must admit I was skeptical of the results I would get from this product. When I received I immediately put the filter into some filthy dish water that had been soaking all afternoon. I only took a tiny drink and was ready to spit it out. The water tasted just as good as the bottle of water I had drank just a couple of hours ago! This will remain in my car in case of emergency. I plan to buy two more to keep at home for emergencies as well. I received this as a free sample as a promise to write a honest review.
Date published: 2018-10-26
Rated 5 out of 5 by from Space saving, great for travel. I have used this water bottle for travel and it worked amazingly well. It takes up almost no room other than the volume of the water inside and weighs next to nothing so is a great option for having in your purse while sight seeing. Additionally, this water bottle does not leak at all! The only con I can think of is that drinking from the bottle takes a bit more skill than other water bottles but I got the hang of it pretty quickly with only a few dribbles (no big deal and was mostly user error). The filter is very easy to remove for times when you aren’t worried about water quality. The is product is great, highly recommend.
Date published: 2019-08-13
Rated 5 out of 5 by from Amazing product, Excellent H2O! This product is great. Before buying this product I had to carry a few water bottles at a time when hiking or camping, and water can be heavy. I'd much rather carry a small amount and have this with me wherever I go. It saves so much space and weight on my hikes. The water isn't nasty after it is filtered, it is very fresh and tastes about the same as bottled water. I would definitely grab one of these if you plan to hike even a few times a year, or go camping. It's saved me so much hassles on the few trips I've used it on already.
Date published: 2018-10-30
Rated 5 out of 5 by from Simply Amazing I have owned a previous lifestraw for my hurricane preparedness kit for a few years. It is really an amazing product. It affords the user to consume water safely from virtually any water source. This new product gives the user much more flexibility in usage as you can now have clean drinking water with you on the go no matter the situation. The compact structure of this product makes it ideal for any backpacker/camper/hiker. You cannot underestimate the value of such a product in emergency situations either.
Date published: 2018-10-22
Rated 5 out of 5 by from Great product! This product is meant to filter your water when you do not have access to clean water and I have to say it is a great find! I like to go hiking and camping and we do not always have access to safe water for drinking. This product makes it easy to put our minds at rest while we are out and about in the deep forest. It is easy to use and after trying the water I was surprised that it taste so good as well!
Date published: 2018-10-25
Rated 5 out of 5 by from Great portable bottle I take water everywhere I go, including several hikes we do weekly, and was excited to try this bottle. I liked the fact that it stored easily being collapsible. So you can fill it up, drink what you need and then store it in your backpack or purse. The flow of the water through the straw was slower then I expected but worked fine for what I need. I’ll order a couple more to have for the family for when we travel so we can have water filtered for whatever country we are in. Also I’ll store a few in our earthquack kit to be prepared
Date published: 2018-10-24
Rated 5 out of 5 by from Convenient I’ve used this water bottle a couple times now and I have to say it’s so convenient! It’s collapsible so I usually leave it in my glovebox in case I forget a water bottle, and it saves me from using single use cups all the time! I also use it in bed because I know it won’t spill if I toss it to the side! Has never leaked and can without a little bit of pressure. I usually use it without the filter because it’s easier to tuck away and the filter is not usually needed. Happy I bought this, can’t wait to travel with it!
Date published: 2019-07-03
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Is the LifeStraw Flex able to be squeezed to filter the water threw it without having to suck on it so you could transfer filtered water to a different container or something of the sort?

Asked by: Andrew B
Answered by: Kiki
Date published: 2020-03-03

how much water does the bottle hold?

Asked by: Rebecca_NB
This bottle holds 22 oz. of water.
Answered by: lifestraw
Date published: 2020-02-21

can it attach to a nalgene water bottle? or are there attachments that could make it fit? (sorry for brand crossing)

Asked by: Rebecca_NB
This cannot be attached to a Nalgene water bottle.
Answered by: lifestraw
Date published: 2020-02-21

does this make salt water from the ocean drinkable?

Asked by: CJBob
Our products cannot be used to drink sea water.
Answered by: lifestraw
Date published: 2020-02-13

What is the maximum temperature of water with this - 50 celsius? Which is the correct carbon filter replacement for this? What is the difference between LIFESTRAW CARBON FILTER REPLACEMENT (HEAVY METALS) and LIFESTRAW CARBON FILTER REPLACEMENT?

Asked by: Grivoise
Our recommended temperature suggestions are as follows: -33 degrees F/1 degree C -The maximum 140 degrees F/60 degrees C The correct carbon capsule for this product can be found below. The other carbon capsule is not compatible with this bottle.
Answered by: lifestraw
Date published: 2020-01-27

If the LifeStraw Flex filters become frozen in cold weather, is it still safe to use after it thaws out, or should the filters be replaced?

Asked by: SteveV
Hi there! If the filter becomes frozen, this compromises the membrane, and it should be replaced.
Answered by: lifestraw
Date published: 2019-11-19

What's the shelf life of original and replacement filters? Is this appropriate for an emergency kit where it might be years before first use?

Asked by: selene
Hi there! None of our products have a shelf life and can be stored in a cool, dry place before you are ready to use it.
Answered by: lifestraw
Date published: 2019-10-15

can i attach the life straw flex to a water bladder tube? so i can drink water and filter it at the same time.

Asked by: Bigjnr
No, I don't believe so. The life straw filter attachment is bigger than a bladder tube.
Answered by: Dalen
Date published: 2020-01-16
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