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 Multi-Function Water Filter - Removes Lead, Bacteria, Parasites & Chemicals is rated 4.4 out of 5 by 29.


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 hollow fiber membrane 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: Hollow fiber microfiltration membrane (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 hollow fiber filter 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.

  • Hollow fiber membrane filter: 0.2 micron pore size. Removes 99.999999% of bacteria, 99.999% of parasites, and 99.999% of microplastics
  • Also removes turbidity (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
  • Hollow fiber filter 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 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 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 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 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 3 out of 5 by from Unique design I will say the Lifestraw was unlike anything I’ve ever used. I took it on a hike with me using just tap water and the water did somewhat better. I found it was awkward to hold while hiking and even more awkward to wash. I totally see the benefits of the Lifestraw if you camped a lot and I do plan on taking it with me in future camping trips. Not really a product I will benefit a lot from having but unique to say the least.
Date published: 2018-10-24
Rated 2 out of 5 by from Useful I received my lifestraw water bottle about a week ago. The concept is dynamite and would be very useful for camping, hiking, or anything where you don’t always have access to clean water. Unfortunately, I haven’t been doing much camping or hiking lately and have been just using it as a normal water bottle. Reviewing the lifestraw as a normal water bottle I would say the bag is too small, the water flow isn’t strong enough, and when the bag is half empty it becomes harder to drink. This is why I gave it a 2 star rating.
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
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With what bottles does the life straw work?

Asked by: Susan
LifeStraw Flex is compatible with regular plastic bottles (i.e. sodas, water, etc.). Simply screw the bottom screw-cap to the top of a plastic bottle.
Answered by: lifestraw
Date published: 2018-10-24

Hello! My question is how much the filter removes chemical stuff, and metals in procent. Furthermore I would like to know how often you have to change the filter. Thanks.

Asked by: Elias
The LifeStraw Flex reduces both chemicals and heavy metals according to the following test results: + Reduces by more than 50% the chlorine presents in water (2mg/l) incordance with NSF/ANSI 42 protocol up to 100 liters + Reduces lead following the requirements at both pH 8.5 and 6.5 in accordance with NSF/ANSI 53 protocol for 200 liters We recommend to replace the filter every 100 liters (25 gallons).
Answered by: lifestraw
Date published: 2018-10-24

Hello, replacing the filter after 100litres means to buy a new one or some replacing kit? Is there any difference between filtration process of LifeStraw flex and LifeStraw Go? Thanks!

Asked by: zemi
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