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Sawyer Products One-Gallon Gravity Water Filtration System

4.6 4.6 out of 5 stars 2,032 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Camping & Hiking Water Filters by Sawyer Products

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Single Bladder
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Purchase options and add-ons

Brand Sawyer Products
Product Dimensions 5.75"L x 2.75"W x 13.75"H
Package Information Bag
Power Source Adapter
Item Weight 8.8 Ounces
Model Name Gravity Water Filter System
Material
Plastic
Capacity
1 Gallons
Included Components
One 1-Gallon Water Bladder, Dual Threaded MINI Water Filter, Cleaning Plunger, Cleaning Coupling, and Gravity Hose with Adapters See more
Purification Method
Hollow Fiber Membrane

About this item

  • Easily create gravity-based water filtering system with 0.1 micron absolute dual-threaded Sawyer MINI water filter and 1-gallon reservoir
  • High-performance 0.1 Micron absolute inline filter fits in the palm of your hand and weighs just 2 ounces; 100% of MINI units individually tested three times to performance standards by Sawyer
  • Dual-threaded MINI allows you to use the cap on the filter for easy on/off functionality; lightweight wide-mouth bladder for fast, easy filling; convenient carry handle
  • Versatile camping water filter system is great for travel, backcountry treks, emergency prepping, and disaster kits
  • Includes MINI Water Filter, 1-gallon bladder, cleaning plunger, cleaning coupling, and gravity hose with adapters

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From the manufacturer

SP160 Gallon Gravity into a bottle

Sawyer Products Logo
About Sawyer

Since 1984, Sawyer Products has offered one of the best, most technologically advanced solutions for protection against sun, bugs, water, and injuries -- everything from first aid kits developed for wilderness to point-of-use water filters that filter contaminated water to levels cleaner than U.S. bottled water.

Sawyer Single Bag Gravity Water Filtration System with 0.1 Micron Water Filter

Superior Filtration, Maximum Versatility

Ideal for backcountry trekking with family and friends or keeping on hand for emergencies, Sawyer's Single Bladder Gravity Water Filtration System provides an easy-to-use, portable, and high-flow gravity-based water filtration system that's great for filtering large quantities of water.

It comes with a Dual-Threaded MINI 0.1 micron water filter, which enables you to directly fill water bottles, soda bottles, hydration packs, and more.

  • Removes 99.99999%* of all bacteria, such as salmonella, cholera, and E.coli
  • Removes 99.9999%* of all protozoa, such as giardia and cryptosporidium
  • Removes 100% of microplastics
  • Filter rated up to 100,000 gallons
  • * Independent testing by Laboratory Hydreion, LLC.; Microbiological Report S05-03
  • † Independent testing by Aquadiagnostics Laboratories and Envirotek Laboratories (S1 – 2512B-12512C; S3 – 12514-12514A), 2017

SP160 Gallon Gravity System

SP160 Gallong Gravity System on a Tree

SP160

SP160 Gallon Gravity System

Gravity Filtering System

Open the wide mouth cap and fill the bag with water from any source — lake, stream, faucet, etc. — and connect the included tube between the bladder and the Dual-Threaded MINI.

After filling, hang the reservoir with the MINI below it from a tree, the back of your pack, or simply hold it up with your hand. Water will flow through the MINI to produce fresh, clean water for drinking and cooking.

Filtered Water Anywhere

Fitting in the palm of your hand, the Dual-Threaded MINI gives you several ways to access clean water. With threads on both sides, you can attach the flip top cap onto the MINI for easy on/off functionality while filtering to control water flow.

The filter can also be attached onto most disposable water or soda bottles, or attach it inline to tubing between a hydration pack and bite valve.

Filter Again and Again

The Dual-Threaded MINI can be cleaned and reused almost indefinitely with no expensive cartridges to replace… ever.

When water flow begins to diminish, simply perform a backwash to restore up to 98% of the filter’s flow rate and enjoy fresh, clean water wherever you roam.

Sawyer's International Mission

Sawyer believes everyone deserves access to clean water — from hikers in the backcountry to indigenous people groups in the remotest corners of the world.

For over 10 years, Sawyer has been working with a variety of charities and churches who are on a mission to make a long-lasting impact in the lives of those around the world without access to clean drinking water.

High Performance Water Filtration

fiber strength

absolute

protected fibers

tested 3 times

Hollow Fiber Membrane

Sawyer’s water filters are comprised of tiny hollow fiber membranes that allow water to enter their core through tiny micro-pores.

Thicker fiber walls combined with a smaller inner diameter make Sawyer fibers 75% stronger* than typical hollow fiber membranes, giving you a fast flow and enabling the filter to be continually backwashed forcefully to restore up to 98% of the original flow rate.

* Clean Water Institute of Calvin University; July, 2018

0.1 Absolute Micron Filtering

Each Sawyer water filter features 0.1 micron absolute filtration, meaning there is no pore size larger than 0.1 micron in size.

This makes it nearly impossible for microplastics, harmful bacteria, protozoa, or cysts like E. coli, Giardia, Vibrio cholerae, and Salmonella typhi (which cause Cholera and Typhoid) to pass through.

Fiber Protection

Sawyer's hollow fiber membranes are fully encased and sealed to keep them protected. When fibers are not enclosed, physical damage of exposed fibers could allow harmful pathogens to pass through.

Tested 3 Times

Every Sawyer filter is performance tested three separate times during the manufacturing process for your protection.

Testing occurs after the fiber element construction and twice after casing assembly to ensure no harmful pathogens leak through the sealed case or internal O-rings.

SP128 Blue Mini Water Filter SP2129 Micro Squeeze Filter SP129 Squeeze Filter SP140 Water Filter Bottle Blue Gravity System
MINI Water Filter Micro Squeeze Water Filter Squeeze Water Filter Personal Water Bottle Filter Gravity System
Customer Reviews
4.7 out of 5 stars
24,439
4.6 out of 5 stars
1,765
4.7 out of 5 stars
9,278
4.4 out of 5 stars
648
4.6 out of 5 stars
2,032
Price $29.97 $32.95 $45.99 $49.99 $45.99
Usage Hiking, everyday use, inline hydration packs Hiking, everyday use, inline hydration packs Hiking, everyday use, inline hydration packs Hiking, everyday use, inline hydration packs, groups, emergency prep, mission trips Group camping and backcountry treks, emergency prep
Filtration 0.1 micron squeeze filter 0.1 micron squeeze filter 0.1 micron squeeze filter 0.1 micron squeeze filter 0.1 micron squeeze / gravity filter
Included Container 16-ounce pouch per MINI 32-ounce pouch 2, 32oz pouches 32oz Bottle 1-gallon bladder
Included Accessories One drinking straw per MINI Drinking straw, drinking cap, inline adapters (faucet adapter with SP2306) Drinking Straw, One Set Of Sawyer Inline Hydration Pack Adapters For Filter, And Mesh Storage Bag Includes 63mm cap that fits standard wide mouth compatible bottles, inline filter, backwash syringe, and 2 replacement straws Gravity hose with adapters
Bacteria Removed 99.99999%* 99.99999%* 99.99999%* 99.99999%* 99.99999%*
Protozoa Removed 99.9999%* 99.9999%* 99.9999%* 99.9999%* 99.9999%*
Microplastics Removed
Chemicals Removed - - - - -
Pesticides Removed - - - - -
Heavy Metals & Viruses Removed - - - - -
SP543 Picaridin Blue Pump Spray Bottle SP714 Maxi DEET Red Pump Spray Bottle Water Bladder SP657 Permethrin Bottle SP1132 Extractor
Picaridin MAXI DEET Premium Family Controlled Release Permethrin Stay-Put Sunscreen Venom Extractor
Customer Reviews
4.6 out of 5 stars
14,770
4.5 out of 5 stars
4,421
4.4 out of 5 stars
1,010
4.6 out of 5 stars
24,683
4.7 out of 5 stars
462
4.5 out of 5 stars
2,098
Price $9.95 $10.99 $8.49 $17.50 $32.42 $14.00
More outdoor products from Sawyer Long-lasting topical insect repellent; effective against Yellow Fever Mosquito (transmits Zika Virus) Low odor topical insect repellent that is effective on mosquitoes, chiggers, fleas, gnats, blackflies, and ticks Effective against ticks and all mosquitoes for up to 11 hours. Odorless, non-greasy, and sweat resistant formula Insect repellent for your clothing; effective against Yellow Fever Mosquito (transmits Zika Virus) Stay-Put SPF 30 with non-greasy breathable Matrix Formula for maximum comfort on hot days Simple suction removes irritants from insect bites and stings to relieve itching and swelling in as little as 5 seconds

Product Description

A lightweight, robust solution for filtering large quantities of water, Sawyer's Gravity System with Dual-Threaded MINI filter is ideal for backpacking, backcountry camping, and emergency preparedness. Available in two models, the 1-Gallon Gravity System (SP160) comes with one bag and a MINI, while the 1-Gallon Dual Bladder Gravity System (SP2160) comes with two bags (one for dirty water, one for clean) and a MINI. The Sawyer dual-threaded MINI water filter weighs just 2 ounces, fits in the palm of your hand, and is rated to 0.1 micron absolute filtration — removing 99.99999% of all bacteria, such as salmonella, cholera, and E.coli, and removing 99.9999% of all protozoa (such as giardia and cryptosporidium). The MINI also filters out 100% of microplastics. With threads on both sides, you can screw the flip top cap onto the MINI for easy on/off functionality while filtering. Convenient and easily packable, this single- and dual-bag gravity system doesn’t require any pumping and is perfect for camping, hunting, fishing, scouting, disaster relief, and emergency preparedness kits, as well as on adventure travel excursions where potable tap and bottled water are not easily carried or safe to drink. The 1-gallon bladders feature a wide mouth cap that allows for fast and easy filling, as well as a convenient carry handle. To set up a gravity system, first fill the reservoir with water from any source (a lake, stream, pond, glacier, kitchen faucet, etc.). Hang the bag — from a tree, the back of your pack, or hold it up with your hand — and connect the MINI to the included hose and let gravity do its work. Water will flow through the MINI to produce fresh, clean water for drinking and cooking. The SP2160 Dual Bladder Gravity System includes a second "Clean Water" 1-gallon reservoir to hold your filtered water. The SP160 package includes a dual-threaded MINI water filter, 1-gallon bladder, cleaning plunger, and gravity hose with adapters. It also comes with Sawyer's Cleaning Coupling accessory. The SP2160 package includes a dual-threaded MINI water filter, dirty water bladder, clean water bladder, tube adapter with shutoff clamp, inline adapters, tube adapter, long tube, hanging strap with S-biner, cleaning plunger, cleaning coupling, flip top cap, and hose guide. Since 1984, Sawyer has used technological advancements to create products that keep you outdoors — from the backcountry to the backyard — including insect repellents for both skin and clothing, water filters for camping and emergencies, and sun protection.

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Sawyer Products One-Gallon Gravity Water Filtration System

Sawyer Products One-Gallon Gravity Water Filtration System


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Customer reviews

4.6 out of 5 stars
4.6 out of 5
2,032 global ratings

Customers say

Customers like the quality, ease of use, and value of the water purification unit. For example, they mention it works well, is easy to set up, and is worth every penny. They also like the ease of cleaning, and portability. That said, opinions are mixed on filter quality, filling, and durability.

AI-generated from the text of customer reviews

70 customers mention55 positive15 negative

Customers like the quality of the water purification unit. They say it works well, is effective, and effortless to use. Some mention that the Sawyer system seems to work well, while others say it's cumbersome. Overall, most are satisfied with the quality and functionality of the product.

"Took this recently on a 6 day river trip in Utah. Worked just as I had hoped. I used it a little different than the standard method...." Read more

"...This system worked great because we didn't have to move the gravity filter and the water was easier to retrieve using the bucket." Read more

"...If you are looking for a system for more than two people that is effective and easy to use then this is the right fit for you." Read more

"...it with duct tape, but it wasn't a perfect fix, and unfiltered water continued to drip out..." Read more

54 customers mention41 positive13 negative

Customers find the water purification unit easy to use. They mention it works well, is convenient, and easy to set up. Some say the water flow is slow. However, most are happy with it overall.

"We used this during a 3 week hunt trip. This water filter was easy to use and the water tasted fantastic from the creek!" Read more

"...Even if you can't find a place to hang the system, it's very easy to screw the filter directly onto the bag and squeeze clean water into a drink..." Read more

"...Super easy to use, weighs nothing, easy to clean up, and you can get a high volume of water through it without having to do all the work yourself -..." Read more

"...This isn't ideal. It's really hard to "aim" into things and the filter is heavy, so it flops around on the end of the hose...." Read more

45 customers mention42 positive3 negative

Customers appreciate the value of the water purification unit. They say it's worth every penny, is worth its weight in gold, and is one of the best on the market. Customers also say it holds a lot to filter, is easy to refill, and lasts a while. Overall, customers find the product to be a great kit and a real life saver.

"Worthwhile. Easy to refill and lasts a while...." Read more

"...However, when you consider the low cost and weight savings, this is by far the better choice...." Read more

"Great product, easy to use. Just finished a 23 mile through hike on the Pine Mountain Trail, GA...." Read more

"...you're going somewhere that you need a big capacity, it's well worth its cost and weight...." Read more

36 customers mention31 positive5 negative

Customers find the water purification unit easy to clean. They mention that the back flush cleaning is easy, fast, and simple. Some say that the water tastes good and that it works great light weight.

"...Super easy to use, weighs nothing, easy to clean up, and you can get a high volume of water through it without having to do all the work yourself -..." Read more

"...Hydration was crucial! This filter delivered the clean water I needed...." Read more

"...The water was pure and fresh. Works great (except for flow)!" Read more

"...This allows me to refill my potable water from natural sources, ensuring safe water without having to drive to town, although it takes a while...." Read more

35 customers mention28 positive7 negative

Customers like the portability of the water purification unit. They say it's easy to carry in a pack, lightweight, and great for backpacking or to campsites with no running water.

"...However, when you consider the low cost and weight savings, this is by far the better choice...." Read more

"...Super easy to use, weighs nothing, easy to clean up, and you can get a high volume of water through it without having to do all the work yourself -..." Read more

"...Much better than pumping and is pretty light. Definitely happy with it overall!" Read more

"...It's not very convenient to carry for backpacking because of its size and shape, but if you can find a way to make it work with your backpack and you..." Read more

49 customers mention26 positive23 negative

Customers are mixed about the filter quality. Some mention it's a great filtering system that does well, while others say it has a design flaw that makes it slower to filter than it should be and clogs faster than expected. It's also slow to fill water bottles and slows down with sediment.

"...Filtered the water perfectly, 1gal took less than five minutes, taste was perfect...." Read more

"...During the 2nd day of use the filter slowed down considerably, but it was still easier than pumping...." Read more

"...Gravity filtration is also handy compared to squeezing the smaller Sawyer bags...." Read more

"...One of my biggest complaints is the filter doesn't have any working safety feature to ensure you install the filter in the correct direction...." Read more

43 customers mention27 positive16 negative

Customers have mixed opinions about the water purification unit. Some mention that it has no problem filling from fast moving creeks, and the flow rate is super. However, others say that it's hard to fill all the way and a challenge to fill from a stream.

"Worthwhile. Easy to refill and lasts a while...." Read more

"...The bag is constructed in such a manner that it is difficult to fill with out getting ones hands wet...." Read more

"...because we didn't have to move the gravity filter and the water was easier to retrieve using the bucket." Read more

"...easy to use, weighs nothing, easy to clean up, and you can get a high volume of water through it without having to do all the work yourself - just..." Read more

31 customers mention14 positive17 negative

Customers are mixed about the durability of the water purification unit. Some mention that it's a solid product, and seems to be of quality. However, others say that the filter clogs easily, the bag tore on their first hike, and part of the tubing also tore.

"...n't screwed on tight, but when I attempted to "tighten" it, it broke off entirely. Turns out, the joint was glued, not screwed...." Read more

"Worthwhile. Easy to refill and lasts a while...." Read more

"...Also, it doesn't fold up well. The plastic bag is very stiff and corner cap doesn't allow for folding very easily...." Read more

"...But the system works and lasts a long time. This is an upgrade from the sawyer squeeze. Just wish the caps and thing made more sense." Read more

worked great for my canoe trip
5 Stars
worked great for my canoe trip
Took this recently on a 6 day river trip in Utah. Worked just as I had hoped. I used it a little different than the standard method. I settled the silt in a 5 gal bucket of river water (using alum-there's YouTube videos how to do this), then used the tubing to make a siphon, with siphon running plugged the tubing into the filter which was screwed directly in to the bladder. That way the bladder stayed clean, filtered water. With filter and bladder sitting on the ground next to the bucket, took about an hour to fill the one gallon bladder. An extra 6 inches of tubing would have made this method a little less fussy, but it worked just fine. Product comes with a good assortment of fittings to make a lot of things possible.In the pictures, the green thing on the bucket is a homemade deal (made from a pill bottle) to keep the tubing from pinching at the edge of the bucket, with rubber band to keep it in place
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Top reviews from the United States

Reviewed in the United States on September 14, 2022
Style: Single BladderVerified Purchase
Took this recently on a 6 day river trip in Utah. Worked just as I had hoped. I used it a little different than the standard method. I settled the silt in a 5 gal bucket of river water (using alum-there's YouTube videos how to do this), then used the tubing to make a siphon, with siphon running plugged the tubing into the filter which was screwed directly in to the bladder. That way the bladder stayed clean, filtered water. With filter and bladder sitting on the ground next to the bucket, took about an hour to fill the one gallon bladder. An extra 6 inches of tubing would have made this method a little less fussy, but it worked just fine. Product comes with a good assortment of fittings to make a lot of things possible.

In the pictures, the green thing on the bucket is a homemade deal (made from a pill bottle) to keep the tubing from pinching at the edge of the bucket, with rubber band to keep it in place
Customer image
5.0 out of 5 stars worked great for my canoe trip
Reviewed in the United States on September 14, 2022
Took this recently on a 6 day river trip in Utah. Worked just as I had hoped. I used it a little different than the standard method. I settled the silt in a 5 gal bucket of river water (using alum-there's YouTube videos how to do this), then used the tubing to make a siphon, with siphon running plugged the tubing into the filter which was screwed directly in to the bladder. That way the bladder stayed clean, filtered water. With filter and bladder sitting on the ground next to the bucket, took about an hour to fill the one gallon bladder. An extra 6 inches of tubing would have made this method a little less fussy, but it worked just fine. Product comes with a good assortment of fittings to make a lot of things possible.

In the pictures, the green thing on the bucket is a homemade deal (made from a pill bottle) to keep the tubing from pinching at the edge of the bucket, with rubber band to keep it in place
Images in this review
Customer image Customer image
Customer imageCustomer image
11 people found this helpful
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Reviewed in the United States on February 10, 2024
Style: Single BladderVerified Purchase
Worthwhile. Easy to refill and lasts a while. I use them here in Haiti to filter water for community members in the rural mountainsides of the southeast region of the country
2 people found this helpful
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Reviewed in the United States on January 6, 2020
Have used Sawyer filters for about three years in every trip to wilderness areas and they have exceeded my expectation: water is clean and delicious. Only thing to watch out for is not to store for too long eithout cleaning as they may get clogged.
6 people found this helpful
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Reviewed in the United States on March 9, 2024
Style: Single BladderVerified Purchase
We used this during a 3 week hunt trip. This water filter was easy to use and the water tasted fantastic from the creek!
Reviewed in the United States on August 7, 2020
It worked well for our needs with minor inconveniences.

The CONS: as other reviews state- we couldn’t fill the bladder all the way up. It was also hard to hang at an appropriate angle to ensure ALL the water came out- we ended up holding/tilting it a little but that could also have been because of our hanging options.
It’s a little slower than ideal, but not bad!

The pros: it holds so much water & does the job right. It isn’t hard to use. It makes having filtered water very easy. We filtered into 3 bag so we just had a supply on hand at any point during our weekend camping trip. & then left it up again to filter into water bottles, too.
3 people found this helpful
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Reviewed in the United States on July 6, 2018
Style: Single BladderVerified Purchase
I have always used the Katadyn pump filters, but I decided to go with a gravity system to save some time and energy at camp. This was perfect, and for a great price! In one minute and ten seconds I was able to filter a liter of water, so it would only take about 5 minutes to filter a full gallon.

The only downside is trying to fill the reservoir from shallow or standing water. This is where pump filters have the advantage, since all you have to do is throw in the line and start pumping. However, when you consider the low cost and weight savings, this is by far the better choice. I carried a cheap plastic water bottle I purchased from a gas station just before the trip, and filled up that bottle with dirty water and bailed it into the Sawyer reservoir. This worked extremely well, and then I just collapsed the empty bottle and stuffed it into the lid of my pack. Even if you can't find a place to hang the system, it's very easy to screw the filter directly onto the bag and squeeze clean water into a drink bottle or bladder system.

Save yourself some money, some ounces, and time by ditching the pump and let gravity do the work! I love my Katadyn, but I think it will collect dust for a long time since the Sawyer has a place in my pack now.

Update 7/27/18: I just used this filter on a 3 night trip for a total of six people. We used the filter at least 3 times per day. During the 2nd day of use the filter slowed down considerably, but it was still easier than pumping. I would suggest back flushing the filter after every gallon when filtering for larger groups.

Also, we used the sea to summit lightweight bucket to get water from a nearby lake, then dumped the water into the Sawyer bladder. This system worked great because we didn't have to move the gravity filter and the water was easier to retrieve using the bucket.
61 people found this helpful
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Reviewed in the United States on August 16, 2023
Style: Single BladderVerified Purchase
I've used this on backcountry trips in Maine and Alaska and love it. Super easy to use, weighs nothing, easy to clean up, and you can get a high volume of water through it without having to do all the work yourself - just let gravity do the work.
3 people found this helpful
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Reviewed in the United States on June 27, 2019
Super convenient. I can just fill the dirty bag, attach the filter, and let gravity do all the work. As long as you back flush the filter at the end of the day the flow rate is fine. Another winner by Sawyer.
2 people found this helpful
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Top reviews from other countries

Translate all reviews to English
EverestDoc
5.0 out of 5 stars Great device. Simple, cheap, lightweight
Reviewed in Canada on December 9, 2019
Style: Single BladderVerified Purchase
Brilliant, simple, lightweight device for making safe drinking water. Some people say slow, but I found the flow rate pretty reasonable - maybe 3 minutes for 1L. So no issue for us. No one unwell drinking this source of water, so thumbs up!
FTG…
5.0 out of 5 stars Bolsa de agua, manguera, boquillas y filtro.
Reviewed in Mexico on August 28, 2019
Style: Single BladderVerified Purchase
Depósito para agua con diferentes conexiones para el filtro de agua de la misma marca, muy útil para cuando acampas por varios días .
G C
5.0 out of 5 stars The Sawyer large filter bag.
Reviewed in Australia on December 18, 2023
Style: Single BladderVerified Purchase
The large size for filtration. Great product.
あー
5.0 out of 5 stars 軽い
Reviewed in Japan on April 4, 2021
Style: Single BladderVerified Purchase
非常用に買ったので漏れにくいかは不明。軽さ抜群
2 people found this helpful
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Ilikethisbelt
5.0 out of 5 stars Compact, portable and reliable
Reviewed in Canada on January 2, 2020
Style: Single BladderVerified Purchase
this contraption works great. I have bunjees and paracord pre set in my pack so in a matter of minutes I can have filtered water trickling into my hydration bladder. The flow rate isnt very fast so it's best to make a setup that you can walk away from as the filter does its job. Also very useful for filling bottles when the local tap water isnt good for drinking, you can hang the bag off a coat hanger and have it steadily filling bottles for you.