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expired Posted by iconian | Staff • Aug 15, 2024
expired Posted by iconian | Staff • Aug 15, 2024

4-Pack Membrane Solutions Water Filter Straws

w/ S&S + Free Shipping

$25

$40

37% off
Amazon
37 Comments 27,402 Views
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Deal Details
Amazon has 4-Pack Membrane Solutions Water Filter Straws (WS02) on sale for $39.99 - $13 'clipped' coupon - 5% Subscribe & Save discount = $24.99. Shipping is free.

Thanks to Deal Editor iconian for finding this deal.

Features:
  • Only detachable straw on the market, both ends can be disassembled.
  • Detachable mouthpiece connects with the common bottle for backwashing
  • 4-Stage Filtration
Note: You must be logged into your account. Coupons are typically one use per account. You have the flexibility to manage your Subscribe & Save subscription at any time after your order ships. View Subscribe & Save filler items and our current Subscribe & Save Frontpage deals to unlock up to extra 15% savings when you have 5 or more items in your current monthly subscription.

Editor's Notes

Written by johnny_miller | Staff
  • About this Offer:
    • This is $3.73 each lower (37% savings) than the next lowest price from a reputable merchant with prices starting from $9.98 each.
  • About this Product:
    • This is rated 4.6 out of 5 stars based on over 1300 ratings at Amazon.
  • About this Store:
  • Please see the original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.

Original Post

Written by iconian | Staff
Product Info
Community Notes
About the Poster
Deal Details
Product Info
Community Notes
About the Poster
Amazon has 4-Pack Membrane Solutions Water Filter Straws (WS02) on sale for $39.99 - $13 'clipped' coupon - 5% Subscribe & Save discount = $24.99. Shipping is free.

Thanks to Deal Editor iconian for finding this deal.

Features:
  • Only detachable straw on the market, both ends can be disassembled.
  • Detachable mouthpiece connects with the common bottle for backwashing
  • 4-Stage Filtration
Note: You must be logged into your account. Coupons are typically one use per account. You have the flexibility to manage your Subscribe & Save subscription at any time after your order ships. View Subscribe & Save filler items and our current Subscribe & Save Frontpage deals to unlock up to extra 15% savings when you have 5 or more items in your current monthly subscription.

Editor's Notes

Written by johnny_miller | Staff
  • About this Offer:
    • This is $3.73 each lower (37% savings) than the next lowest price from a reputable merchant with prices starting from $9.98 each.
  • About this Product:
    • This is rated 4.6 out of 5 stars based on over 1300 ratings at Amazon.
  • About this Store:
  • Please see the original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.

Original Post

Written by iconian | Staff

Community Voting

Deal Score
+28
Good Deal
Visit Amazon

Price Intelligence

Model: Membrane Solutions WS02 4-Stage Water Filter Straw, Detachable, 0.1-Micron, Portable, 4-Pack, BPA-Free, Food-grade, Ideal for Hiking, Camping, Travel, Emergency Preparedness

Deal History 

Sort: Most Recent
Post Date Sold By Sale Price Activity
06/06/24Amazon$24 frontpage
13

Current Prices

Sort: Lowest to Highest | Last Updated 6/18/2025, 12:03 PM
Sold By Sale Price
Amazon$39.99
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Top Comments

So these filter particulates but what about things like parasites, chemical contamination, etc?
These are knockoffs of life straw ✌️
You're killing me here. My inner prepper keeps buying stuff. Enoughhhhhhh already.
In for one....thx op.....I don't like you.

36 Comments

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Aug 16, 2024
8 Posts
Joined Sep 2010

This comment has been rated as unhelpful by Slickdeals users.

Pro
Aug 16, 2024
2,051 Posts
Joined Dec 2012
Aug 16, 2024
snafufubarpita
Pro
Aug 16, 2024
2,051 Posts
Quote from sbk_doll :
These are better than life straw! Great buy!
These are knockoffs of life straw ✌️
2
Aug 16, 2024
1,547 Posts
Joined Jul 2006
Aug 16, 2024
Analog
Aug 16, 2024
1,547 Posts
Looks like something great for emergencies or back country camping.
Aug 16, 2024
232 Posts
Joined Jun 2018
Aug 16, 2024
Rayacer
Aug 16, 2024
232 Posts
Can you use this on salt water?
1
Aug 16, 2024
1,214 Posts
Joined May 2013
Aug 16, 2024
TechManDad
Aug 16, 2024
1,214 Posts
Quote from Rayacer :
Can you use this on salt water?
No. For that you need dedicated desalination such as distillation or for low salt, Reverse osmosis.
Aug 16, 2024
1,214 Posts
Joined May 2013
Aug 16, 2024
TechManDad
Aug 16, 2024
1,214 Posts
Quote from sbk_doll :
These are better than life straw! Great buy!
They certainly are cheaper.

As far as function they are likely the same since they both advertise 0.1 micron.

Lifestraw seems like the original, and better built.
1
Aug 16, 2024
129 Posts
Joined Jul 2019
Aug 16, 2024
BrianD1969
Aug 16, 2024
129 Posts
You're killing me here. My inner prepper keeps buying stuff. Enoughhhhhhh already.
In for one....thx op.....I don't like you.
3

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Aug 16, 2024
219 Posts
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Aug 16, 2024
officeshopper
Aug 16, 2024
219 Posts
4 pack, why would you need (4)? Are they a one and done use? Just curious.. of course (4) for four different people but wasn't sure if -they only need to be used once or something.
Aug 16, 2024
12 Posts
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Aug 16, 2024
mtbeck90
Aug 16, 2024
12 Posts
Deal. In for 1
2
Aug 16, 2024
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Abused.Return.Policy
Aug 16, 2024
5,293 Posts
Quote from TechManDad :
No. For that you need dedicated desalination such as distillation or for low salt, Reverse osmosis.
So these filter particulates but what about things like parasites, chemical contamination, etc?
1
Aug 16, 2024
1,214 Posts
Joined May 2013
Aug 16, 2024
TechManDad
Aug 16, 2024
1,214 Posts
Quote from Christian4423 :
Someone works for life straw
Mmmkay buddy.

You'll have to show where I'm wrong first, before we take you seriously.
7
Aug 16, 2024
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Aug 16, 2024
TechManDad
Aug 16, 2024
1,214 Posts

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

Quote from Dealer_Of_Slickness :
So these filter particulates but what about things like parasites, chemical contamination, etc?
I'm not an expert.

0.1 microns seems to be the standard for heavy metals, plastic, bacteria, and many chemicals.

0.1 micron seems like the best you can get before going to RO which requires more pressure and can be inconvenient to carry.

The goal of these filters is to allow you to hydrate and not get a gastrointestinal sickness while away from medical services.

Unknown stuff is going to get through, but probably not the ones that make you sick.

Hence the "99.999999%" they always advertise.
1
Aug 16, 2024
756 Posts
Joined Nov 2014
Aug 16, 2024
warre2m
Aug 16, 2024
756 Posts

Our community has rated this post as helpful. If you agree, why not thank warre2m

These are great. I use them backpacking without issue. I think the Life Straw Squeeze has a dangerous design flaw with how the filter attaches. It can fall off inside the bag without the user noticing and then you're screwed. Pun intended as it should be a screw threaded design.
1
1
Aug 17, 2024
371 Posts
Joined Nov 2010
Aug 17, 2024
lawstudent
Aug 17, 2024
371 Posts
For reference the older version 4 pack was $15 couple weeks ago. I almost bought but fell asleep on the couch.

This newer version was a 5 pack for $28 last May. Newer version has additional compatibility for water bottle thread coupling from what I can tell.

The slick deals all seem to copy and paste jobs from prepping deals dot net. Or vice versus.

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Aug 17, 2024
1,596 Posts
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Aug 17, 2024
SiXiam
Aug 17, 2024
1,596 Posts
Quote from TechManDad :
I'm not an expert.

0.1 microns seems to be the standard for heavy metals, plastic, bacteria, and many chemicals.

0.1 micron seems like the best you can get before going to RO which requires more pressure and can be inconvenient to carry.

The goal of these filters is to allow you to hydrate and not get a gastrointestinal sickness while away from medical services.

Unknown stuff is going to get through, but probably not the ones that make you sick.

Hence the "99.999999%" they always advertise.
Yes, it is a number game. One bacteria or one virus would give very low, almost impossible odds of you getting sick. But the larger the group the worse your odds.

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