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Seychelle Water Purifier Straw

Seychelle Water Purifier Straw
Seychelle Water Purifier Straw

The Seychelle Advanced Pure Water Straw is a full-fledged water purifier in straw form, capable of filtering out 99.9999% of viruses and bacteria as wells as 99.99% of Guardia and Cryptosporidium. It has a capacity to filter up to 25 gallons of water, costs $16.95 and weighs almost nothing.

I’ve taken it on several long hikes to test it out and I really like the way it’s designed. Like the Aquamira Frontier Pro, the Seychelle Water Straw has a cap to cover the mouthpiece and prevent “dirty” water from leaking in and making you ill. But the cap on the Seychelle is better because it screws shut and is completely waterproof, unlike the Frontier Pro mouthpiece, which is held on by an elastic band, and can get wet if water leaks inside the cap or you drop it in the drink.

Seychelle Water Straw Cap
Seychelle Water Straw Cap

Similarly, the purifier element is more advanced that the activated charcoal filter present in the Frontier Pro, and not only removes viruses, but also other chemical pollutants such as DDT, MTBE, Benzene, Chloroforms (THM’S); and Dissolved Solids (Heavy metals) such as Arsenic, Lead, Mercury, Copper, Zinc, Aluminum and Chromium 6.

The purifier element, which is about the size of a cigarette filter, plugs snugly into the base of the water straw, and is held in place by a perforated plastic cap. Unfortunately, you can’t buy replacement purifiers for the housing and need to dispose of the whole unit when the 25 gallon maximum limit is reached.

There is also a break-in time during which water purifier by the filter tastes a bit salty. This has also been noted by section hikers regarding the Seychelle Water Bottle Purifier.

Seychelle Water Purifier
Seychelle Water Purifier

However, the packaging as a water straw turns out to be this purifier’s chief undoing for non-emergency use, limiting it’s usefulness for anything more than day hiking. The fact is, that a straw is an inconvenient form factor for filtering or purifying water because you can’t collect it in a reservoir for future use and because the straw is not long enough to reach down into a high sided container like a platypus or camelbak water reservoir. While you could drink directly from a stream bank by lying on your belly, that’s not really a practical solution because you want to be able to carry a quantity of water with you when you’re not close to a fresh water source.

Despite these limitations, the water straw provides a viable solution for emergency water purification in non-wilderness settings and demonstrates how water purification technology has progressed beyond the need for bulky housings such as the First Need XL. It’s only a matter of time now before someone incorporates these purifier elements into an ultralight pump-based system with standard reservoir adapters.

Disclosure: The author owns this product and purchased it using their own funds.

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  1. Thanks for the info, I normally carry a Frontier Pro as a backup. Maybe I will switch to this.


  2. Hi,

    How do you know when you have hit the 25 gallon limit?

    Trying to think of a system, I guess you could carry a couple of gatorade bottles of "dirty" water.

  3. The same way you keep track with any other water filter….you just keep track. Unfortunately, the gatorade bottles don't really work that well because the straw is fairly short. You need to pour the water into a pot and drink from there. I think it's be better as an inline cartridge myself.

    1. We were planning to purchase the straw filter as an emergency water filter until we stumble across a light weight mini water filter pump. We decided to try out and test the product and we were please with the results.
  4. Or the same you keep track of any other water filter- YOU DON'T! and that's why I don't use "filters" and instead opt for chemical or UV treatment of water. How do you know if there is a crack inside the straw or filter? I was once hiking with a partner and noticed some charcoal sediment on the bottom of their drinking bottle. We took apart his filter and noticed a hairline crack in the ceramic element. How long had it been there? Who knows??

  5. @Chai guy, are you aware that most chemical purifier have a limitation usage and it clearly warns you of frequent consumption, are you aware charcoal sediment do not harm your body but instead it helps. Water filter is a front line filtration for free sediments in the water but it is not necessary disease borne free, as for us, we would rather boil the water even after filtration.

    As for your friend's filter element, have you asked him, did he keep a frequent check on his gears. There is not fool proof gear today in the market but there is always an idiot who thinks his gear is fool proof. End of the day, The choice is yours.

  6. I test my 3 season filter purifer [1st NEED] by filtering water with blue food dye in it.

    My winter filter purifer is a melting snow stove and a coffee filter.

  7. Great article and excellent idea for a common issue that many face when hiking. In the near future they will have a mini UV filtration system with the same design as this one. This device would be the number one seller if that could be implemented into the Pure Water Straw.

  8. After I read this article I tried to think of a way to use this straw in a backpacking setting. I’ve never used water filters/purifiers but I am trying to learn. This straw seems quite lightweight but it obviously lacks the ability to suck water out of a high sided container and it also is hard to keep track of how many gallons have been filtered through it. My quick and cheap idea would be this. Cut a 1 liter Polar Seltzer bottle in half so it holds a 1/2 liter. Leave it a little taller so you’re not spilling everywhere. At home, measure out a 1/2 liter of water and fill up your newly-cut cup. Mark a line around the top with a sharpie where the 1/2 liter of water fills up to. Take a hold punch tool and poke a hole in the top edge of your cup, just big enough to get a small carabiner through, in order to attach the cup to any lashing strap on the outside of your pack.
    Now, when you are hiking along and you get to a stream, you have an easy way to “camel up”. Unhook your cup and dip it in the stream so it is filled up to the 1/2 liter line. Use your straw to drink up the water. If you can’t keep track in your mind, you could always carry a little sharpie to make a tally mark on the cup for the number of times you’ve drank a 1/2 liter, this will help you keep track of the straw’s life.
    Some other water purification methods may be easier or more useful in the field, but I suppose this is one way you could use this straw effectively while backpacking, especially if you have fairly frequent access to water sources, such as in NH.

  9. If you find charcoal in your drinking container that has leaked out of your filter, that filter is WORTHLESS. It is NOT safe to drink the charcoal as one writer claims because the contaminants you want the filter to remove from the water are in the charcoal that leaked out. So you are ingesting the contaminants along with the charcoal. But it makes no sense how you could ingest the charcoal in the first place if it remains in the bottom of a cup and you are sucking water through the device, not drinking the contaminated water from the cup itself. What is that writer thinking?

    Furthermore, if the charcoal can leak out, then the contaminated water can take a shortcut through the cracked charcoal housing and you can be sucking up UNFILTERED contaminated water. THAT makes the whole filter WORTHLESS.

    For the writer who insinuated that the user who discovered the cracked filter housing was an idiot for not checking his filter before starting his trip, as he said, he had no idea when it cracked. He didn’t say he didn’t check it before traveling. Just that he didn’t know when on his trip it had cracked. It doesn’t matter if it broke in manufacture, in shipping, or on the trip. If the filter housing is so defective or shoddy that it cracks and renders the filter WORTHLESS, then this is either something to watch out for in every use, or a filter to avoid altogether — your choice.

    But then the writer who called another writer an idiot was the same one who laughingly mistated that this biological filter being reviewed only removed particulates and not bilolgical contaminates. How often the name caller is the very thing he calls others.

    My problem with the Seychelle Advanced Filter Straw is the plastic screw threads that secure the filter in place are so poorly designed that the two parts don’t line up (end up crooked) such that the o-ring seal doesn’t actually seal properly. Overtightening weak plastic threads invites cracking the plastic filter housing as just discussed. There are 4 threads on one piece but only 2 threads on the other piece engage to contact the o-ring. It appears likely that the device is so weak at those inadequate threads that it will break at that point no matter how carefully you pack it for use in the outdoors.