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expired Posted by TattyBear | Staff • Apr 19, 2024
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expired Posted by TattyBear | Staff • Apr 19, 2024

4-Pack Membrane Solutions Personal Water Filter Straws

w/ Subscribe & Save + Free Shipping

$16

$43

62% off
Amazon
40 Comments 24,780 Views
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Deal Details
Membrane Solutions Corp via Amazon has 4-Pack Membrane Solutions Personal Water Filter Straws on sale for $15.59 when you clip the 50% Off coupon on the page and checkout with Subscribe and Save. Shipping is free w/ Prime or on $35+ orders.

Thanks to Deal Hunter TattyBear for sharing this deal.About this Item:
  • SGS certificated, Test Report NBF21-004693-01
  • up to 1,320 gallons lifespan
  • 7.1'' long and 1" in diameter
  • Fits any 28mm threaded bottle
  • 5-Stage Filtration System removes up to 99.99999% of harmful substances (pollution, odor, chlorine and organic chemicals, etc.)

Editor's Notes

Written by SaltyOne | Staff
  • About this Deal:
    • Rated 4.7 out of 5 stars from customer reviews.
    • This price comes out to $3.90 per filter straw.
    • At the time of this posting, our research indicates that this is $1.60/each lower than the next best options with prices starting from $5.50/each. -SaltyOne
  • About this Store:

Original Post

Written by TattyBear | Staff
Product Info
Community Notes
About the Poster
Deal Details
Product Info
Community Notes
About the Poster
Membrane Solutions Corp via Amazon has 4-Pack Membrane Solutions Personal Water Filter Straws on sale for $15.59 when you clip the 50% Off coupon on the page and checkout with Subscribe and Save. Shipping is free w/ Prime or on $35+ orders.

Thanks to Deal Hunter TattyBear for sharing this deal.About this Item:
  • SGS certificated, Test Report NBF21-004693-01
  • up to 1,320 gallons lifespan
  • 7.1'' long and 1" in diameter
  • Fits any 28mm threaded bottle
  • 5-Stage Filtration System removes up to 99.99999% of harmful substances (pollution, odor, chlorine and organic chemicals, etc.)

Editor's Notes

Written by SaltyOne | Staff
  • About this Deal:
    • Rated 4.7 out of 5 stars from customer reviews.
    • This price comes out to $3.90 per filter straw.
    • At the time of this posting, our research indicates that this is $1.60/each lower than the next best options with prices starting from $5.50/each. -SaltyOne
  • About this Store:

Original Post

Written by TattyBear | Staff

Community Voting

Deal Score
+67
Good Deal
Visit Amazon

Price Intelligence

Model: Membrane Solutions Portable Water Filter Straw Filtration Straw Purifier Survival Gear for Hiking, Camping, Travel, and Emergency, Blue, 4 pack

Deal History 

Sort: Most Recent
Post Date Sold By Sale Price Activity
05/26/25Amazon$16
0
08/27/24Amazon$16
2
06/08/24Amazon$16
8
06/05/24Amazon$16 popular
24
12/12/23Amazon$25
1
09/28/23Amazon$16
1
08/22/22Amazon$31
0
02/06/21Amazon$22
1
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Current Prices

Sort: Lowest to Highest | Last Updated 5/29/2025, 01:10 AM
Sold By Sale Price
Amazon$38.98
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Top Comments

mcjiver
I hope to shed some light as I have worked in this industry for several companies. To those who are worried about it being an unknown brand: the filter media design and material are going to be the same in all these straw tube-style filters. They are extremely cheap to manufacture but early adopters and well known brands charge more because they market better. They should not effectively expire if they are kept out of damp or humid conditions. On that same note, best practice is to back flush with clean water after use or every 20-30 gallons during active use as the media does plug up and contaminants need to be released. Always shake them dry between use and don't store them in something air tight.
Sorry, that was long winded.
sarcasmogratis
Is this a well known brand? I'm unfamiliar.

Edit: not well known. some apologists in the comments claiming they are all the same...which is a weird claim for safety equipment.
the business address is a residential house. always a little sketch.
the name is hard to pin down. one nearby company does provide filtration for lab equipment but doesn't list this item on their website.
YMMV/Buyer Beware ...which for any safety/emergency equipment is an immediate pass for me.

I see it's being promoted by a Paid SD Staff Influencer...is this an affiliate? paid advert? any vetting/communication with the company to clear up the concerns? it's been pushed to Frontpage now. I also wonder if the phrasing "sharing this deal" is meant to be a CYA rather than claiming to have "found" this deal like some other posts or if it's just DE style choice

Edit 2:
https://www.mspurelife.com/
this might be their website
0% surprised to see they gave an affiliate/referral kickback program
website business address:
https://maps.app.urlhasbeenblocke...uGdamwGSq7
which then goes to this
https://www.membrane-solutions.com/
gastoncards
Be advised that these are not the well known life straw brand. They are even made with the same color etc to make people think they are life straw at first glance. They may work ok, I don't know. However when it comes to potential lifelines I try and stick to what I know I can trust. You don't skimp on those types of things.

39 Comments

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Apr 20, 2024
96 Posts
Joined Jan 2014
Apr 20, 2024
1360-Hanger
Apr 20, 2024
96 Posts

Our community has rated this post as helpful. If you agree, why not thank 1360-Hanger

I'm going to stock up on these so I can trade for and other supplies when the apocalypse hits. I'll keep the name brand ones for me and my fam. Either way these are good to have and I will store them right next to my ammo. 🫡👍🏻
1
Apr 20, 2024
54 Posts
Joined Mar 2014
Apr 20, 2024
mcjiver
Apr 20, 2024
54 Posts
Quote from brucedc :
Why not store these in an air tight vacuum? Would that keep the humidity away which would allow this to last longer?
Sorry, let me clarify. They are fine closed up if they are brand new. after any use, a mesh bag is best so they can breath out any trapped moisture.
Apr 20, 2024
8,743 Posts
Joined Mar 2004
Apr 20, 2024
carbonfiber
Apr 20, 2024
8,743 Posts
do these expire?
Apr 20, 2024
2,951 Posts
Joined Jun 2010
Apr 20, 2024
booboloo
Apr 20, 2024
2,951 Posts
Good to have at a why not price.
Apr 20, 2024
2,737 Posts
Joined Feb 2013
Apr 20, 2024
rogere
Apr 20, 2024
2,737 Posts
Quote from brucedc :
Why not store these in an air tight vacuum? Would that keep the humidity away which would allow this to last longer?
I've heard of documents in sealed safes getting mold because a tiny amount of moisture. Sealing is a good idea until you seal moisture within, stuff can go bad really quickly.
Pro
Apr 20, 2024
1,195 Posts
Joined Sep 2010
Apr 20, 2024
printer88
Pro
Apr 20, 2024
1,195 Posts
Quote from carbonfiber :
do these expire?
From the manufacturer "Under normal circumstance,it can be stored for 24 month.
Membrane Solutions Corp"
1
Apr 20, 2024
1,112 Posts
Joined Feb 2009
Apr 20, 2024
mcshaggin
Apr 20, 2024
1,112 Posts
Is it frowned upon to use this at a resturaunt in Mexico? If it came to a life saving point, I'd still struggle to get my face so close to some say a toilet or putrid water source.

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Apr 20, 2024
467 Posts
Joined Feb 2009
Apr 20, 2024
TheXung
Apr 20, 2024
467 Posts
Quote from mcjiver :
I hope to shed some light as I have worked in this industry for several companies. To those who are worried about it being an unknown brand: the filter media design and material are going to be the same in all these straw tube-style filters. They are extremely cheap to manufacture but early adopters and well known brands charge more because they market better. They should not effectively expire if they are kept out of damp or humid conditions. On that same note, best practice is to back flush with clean water after use or every 20-30 gallons during active use as the media does plug up and contaminants need to be released. Always shake them dry between use and don't store them in something air tight.
Sorry, that was long winded.
The Sawyer claims 75% thicker straw walls. That's how they claim a lifetime longevity; the stronger straws withstand infinitely more backflushes.

The lifespan rating on these indicate they are using the thinner walled straws similar to non-sawyer filters. The weight and low flow rating indicate they are using less straws than non-sawyer filters.

If you need 4 emergency filters as cheap as possible, better to have these than nothing. If it's just yourself and you will likely use a filter while backpacking, then get a sawyer squeeze. Families in developing nations have used a single filter to meet their drinking water needs for multiple households for DECADEs. Also keep in mind, there is no way to test if these have failed.
Apr 20, 2024
305 Posts
Joined Oct 2008
Apr 20, 2024
Gumlung
Apr 20, 2024
305 Posts
Quote from brucedc :
Why not store these in an air tight vacuum? Would that keep the humidity away which would allow this to last longer?
I think he meant to keep the straw locked up in an air-tight bag or container if it's new or already completely dry. If it has been used recently, I'd leave out to air dry before sealing it back up.
Apr 20, 2024
5,441 Posts
Joined Mar 2007
Apr 20, 2024
Leonidas
Apr 20, 2024
5,441 Posts
Unknown brand. Lifestraw duplicate. Use at your own risk.
Apr 20, 2024
394 Posts
Joined Dec 2013
Apr 20, 2024
Showmethmoney
Apr 20, 2024
394 Posts
Quote from busybugsy :
A great fear based logic. Let's all make fear based decisions and ignore experts and science.
Ya because science. Where have we heard that? Oh ya the clot shots! Starwars
1
4
Apr 20, 2024
242 Posts
Joined May 2015
Apr 20, 2024
gastoncards
Apr 20, 2024
242 Posts
Quote from busybugsy :
A great fear based logic. Let's all make fear based decisions and ignore experts and science.
What expert science do you have?? Ignore what? That these are purposely designed to look like a life straw and rip off their brand and reputation? You know they are as good? 😖😖😖. Ugh.
1
1
Apr 20, 2024
766 Posts
Joined Aug 2006
Apr 20, 2024
gbcue
Apr 20, 2024
766 Posts
Quote from my3cents :
The LifeStraw brand claims NSF Certified, these don't.

https://www.nsf.org/knowledge-lib...tification
The funny part is that neither filter (not company) can be found on the NSF's webpages...

https://www.nsf.org/certified-products-systems

Search Membrane Solutions (this product) and/or Vestergaard (Lifestraw).
Last edited by gbcue April 20, 2024 at 01:28 PM.
1
Apr 20, 2024
506 Posts
Joined Sep 2007
Apr 20, 2024
noho
Apr 20, 2024
506 Posts
Just bought one for Yosemite next September. I nearly didnt make it on the way back from half dome. Ran out of water about an hour before the river as the last vistor that day. Then my iphone lost battery and I was stranded with no moon inthe sky. Pitch black. LOL! 3 young hikers saved me at 3 AM. Fool!

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Apr 20, 2024
101 Posts
Joined Dec 2013
Apr 20, 2024
NoleInJax
Apr 20, 2024
101 Posts
Quote from gastoncards :
Not going to trust my life or families on some unknown Chinese imposter brand that purposely attempts to make people think they are legit life straws. They are intentionally trying to be deceptive. Just my opinion based on field use in 8 countries and having my life depending on a water filter.
Can always buy a 4 pack and randomly test one. If they suck, get a refund. Thanks OP. I'm going to grab a pack to compare with one of the LifeStraw's I bought awhile back.
1
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