expired Posted by TattyBear | Staff • Apr 19, 2024
Apr 19, 2024 10:20 PM
Item 1 of 1
expired Posted by TattyBear | Staff • Apr 19, 2024
Apr 19, 2024 10:20 PM
4-Pack Membrane Solutions Personal Water Filter Straws
w/ Subscribe & Save + Free Shipping$16
$43
62% offAmazon
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Sorry, that was long winded.
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.
this might be their website
0% surprised to see they gave an affiliate/referral kickback program
website business address:
https://maps.app.urlhas
which then goes to this
https://www.membrane-solutions.com/
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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.
Post a link to the "experts and science" and I might believe you.
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Some critical flaws of the original Lifestraw are that it literally has no bottle threading, so its only use case is to use it like a straw, meaning lowering your head down to a water source and only drinking when you are at a water source or carrying your water in a wide mouth bottle like a nalgene because it's the fattest "straw" you've ever drank from. And because of the lack of bottle threading, you can only force water through by sucking, meaning sharing a filter between multiple people would mean everyone drinking from the same straw. Sucking from it also means you can't cook with it.
The Membrane Solutions imitation lifestraw at least has bottle threading, so it has none of the cons of the lifestraw. It's flow rate is really low though. The Sawyer Squeeze is rated for 1.7L/min (you probably can't get this theoretical 1.7L/min though; the most I've gotten is 1.5L/min). At 0.5L/min, this straw is less than a third of the Sawyer, and all filters will slow down even more as they get used. I'll use my Sawyer down to around 1L/min before I backflush it to clean it up, which I'm not even sure if this straw is designed to do or has assessories to facilitate.
In filter designs, there is a trade off between flow rate, filtering level, and amount of filtering material. You can increase the flow rate by either lowering the filtering level (0.2 micron vs 0.1 micron) or you can increase the amount of filtering material (causes the filter to weigh more). The Sawyer filters 0.1 micron at 1.7L/min and weighs 3 oz. This straw filters at 0.1 micron, 0.5L/min and weighs 2oz; it clearly has less filtering material to have a lower flow rate. The original lifestraw filtered at 0.2 micron, an unknown flow rate since you have to suck through it, and weighs 1.6oz. There are other backpacking filters out there, most of them filter at 0.2 microns, advertise a higher flow rate and weigh 2oz; they are sacrificing water safety for higher flow rates and achieving higher flow rates with more filtering material. The Sawyer is the only filter with a lifetime longevity.
https://www.nsf.org/certified-products-systems
Search Membrane Solutions (this product) and/or Vestergaard (Lifestraw).
https://info.nsf.org/Certified/dw...ogram=DWTU
Membrane Solutions here, but nothing that looks like straws:
https://info.nsf.org/Certified/dw...ogram=DWTU
Some critical flaws of the original Lifestraw are that it literally has no bottle threading, so its only use case is to use it like a straw, meaning lowering your head down to a water source and only drinking when you are at a water source or carrying your water in a wide mouth bottle like a nalgene because it's the fattest "straw" you've ever drank from. And because of the lack of bottle threading, you can only force water through by sucking, meaning sharing a filter between multiple people would mean everyone drinking from the same straw. Sucking from it also means you can't cook with it.
The Membrane Solutions imitation lifestraw at least has bottle threading, so it has none of the cons of the lifestraw. It's flow rate is really low though. The Sawyer Squeeze is rated for 1.7L/min (you probably can't get this theoretical 1.7L/min though; the most I've gotten is 1.5L/min). At 0.5L/min, this straw is less than a third of the Sawyer, and all filters will slow down even more as they get used. I'll use my Sawyer down to around 1L/min before I backflush it to clean it up, which I'm not even sure if this straw is designed to do or has assessories to facilitate.
In filter designs, there is a trade off between flow rate, filtering level, and amount of filtering material. You can increase the flow rate by either lowering the filtering level (0.2 micron vs 0.1 micron) or you can increase the amount of filtering material (causes the filter to weigh more). The Sawyer filters 0.1 micron at 1.7L/min and weighs 3 oz. This straw filters at 0.1 micron, 0.5L/min and weighs 2oz; it clearly has less filtering material to have a lower flow rate. The original lifestraw filtered at 0.2 micron, an unknown flow rate since you have to suck through it, and weighs 1.6oz. There are other backpacking filters out there, most of them filter at 0.2 microns, advertise a higher flow rate and weigh 2oz; they are sacrificing water safety for higher flow rates and achieving higher flow rates with more filtering material. The Sawyer is the only filter with a lifetime longevity.
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
https://www.nsf.org/knowledge-lib...tification [nsf.org]
NSF stands for National Sanitation Foundation. It tests for pesticides, herbicides, heavy metals, microbial contaminants, and 280 banned substances. NSF-certified water filtration products are said to ensure safe and quality drinking water.
SGS is a Swiss multinational company that provides inspection, testing, verification, and certification services. In 2021, SGS was accredited by the American National Standards Institute (ANSI) to provide third-party certification of NSF/ANSI standards for food service and commercial appliance equipment products.
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NSF stands for National Sanitation Foundation. It tests for pesticides, herbicides, heavy metals, microbial contaminants, and 280 banned substances. NSF-certified water filtration products are said to ensure safe and quality drinking water.
SGS is a Swiss multinational company that provides inspection, testing, verification, and certification services. In 2021, SGS was accredited by the American National Standards Institute (ANSI) to provide third-party certification of NSF/ANSI standards for food service and commercial appliance equipment products.