How long does the filter last?

LASETO rates it for about 1,500 gallons, or 5,700 liters, roughly two years of typical hiking use. Capacity drops as the membrane clogs, so backflushing extends life.

Does it remove viruses?

No. A 0.2-micron hollow-fiber membrane catches bacteria and protozoa but not viruses, which are far smaller. For travel in areas with viral risk, use a purifier with chemical or UV treatment.

Will it fit my water bottle?

It connects to standard bottle threads and hydration pouches, so most wide- and narrow-mouth bottles work. Test the fit before a trip.

How is it different from a LifeStraw or Sawyer Mini?

It adds a carbon stage for taste and claims a longer life, but those rivals have years of field testing and published test data. Treat LASETO's removal figures as manufacturer claims.

What comes in the box?

One filter straw. No backflush syringe, carry bag or bottle adapter is listed, so plan to clean it by backflushing with clean water from a bottle or pouch.

Can I use it for muddy or cloudy water?

The pre-filter and PP cotton layers handle some sediment, but very cloudy water clogs the membrane fast. Let sediment settle first and backflush often.

Where is the Water Filter Straw cheapest?

At Walmart, for $14.99, as of our latest check.

LASETO

Water Filter Straw

Best price now

$14.99at WalmartChecked Nov 10

Prices are checked against each store and labelled with when.

Visit Walmart

LASETO

Water Filter Straw

Best price now

$14.99at WalmartChecked Nov 10

Prices are checked against each store and labelled with when.

Visit Walmart

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Price facts

Last seen at $14.99 at Walmart on Nov 10.

Our take on the Water Filter Straw

The LASETO Water Filter Straw is a personal backcountry filter that works by sucking water straight through a five-stage stack: a pre-filter, two layers of PP cotton, coconut-shell activated carbon and a hollow-fiber membrane rated to 0.2 microns. LASETO rates it for about 1,500 gallons (5,700 liters) and claims removal of coliform, E. coli, heavy metals, chlorine and odors. It fits standard bottle and pouch threads, so it doubles as a gravity or squeeze setup. Against rivals like the Sawyer Mini and LifeStraw, it trades their field-proven reputations for a lower-cost, higher-capacity claim and a carbon stage that improves taste.

Best forHiking and backpacking with a water bottle or pouchEmergency kits and bug-out bagsCampers who want better-tasting water from streamsTravelers wary of tap water in remote areas

Pros

Five filtration stages, including activated carbon for taste and odor
0.2-micron hollow-fiber membrane blocks microplastics and bacteria
Long rated life of about 1,500 gallons
Screws onto standard bottles and hydration pouches
Lightweight BPA-free plastic body

Cons

No independent lab certification named for the removal claims
Does not remove viruses, so it is not for questionable water abroad
No backflush syringe or gravity adapter listed in the box
Sucking through a 0.2-micron membrane takes effort as it clogs

Water Filter Straw prices at every store

WalmartNew
In stockSold by LASETOReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
$14.99Free shippingChecked Nov 10
Visit Walmart

About the Water Filter Straw

This portable water filter straw is made for drinking clean water outdoors. It uses a 5-stage filtration system: a pre-filter, dual-layer PP cotton, coconut shell activated carbon, and hollow fiber ultrafiltration membranes.

The filter removes 99.99999% of coliform, E. coli, heavy metals, chlorine, and unpleasant odors. It filters particles down to 0.2 microns, including microplastics at 1 micron. It can filter up to 5,700 liters (1,500 gallons) of water.

It connects with standard water bottles, hydration pouches, and cups. The body is BPA-free, food-grade plastic. It is compact and lightweight for hiking, camping, emergency preparedness, and survival gear.

Product type: Pure Flow Water Filter Straw
Material: BPA-free food-grade plastic
Filtration: 5 stages: pre-filter, dual-layer PP cotton, coconut shell activated carbon, hollow fiber ultrafiltration membranes
Filter precision: 0.2 microns; microplastics at 1 micron
Removes: 99.99999% of coliform, E. coli, heavy metals, chlorine, and odors
Capacity: Up to 5,700 liters (1,500 gallons)
Compatibility: Standard water bottles, hydration pouches, and cups
In the box: 1 × Pure Flow Water Filter Straw

Specifications

number_of_pieces: 1Source

Questions and answers

How long does the filter last?: LASETO rates it for about 1,500 gallons, or 5,700 liters, roughly two years of typical hiking use. Capacity drops as the membrane clogs, so backflushing extends life.
Does it remove viruses?: No. A 0.2-micron hollow-fiber membrane catches bacteria and protozoa but not viruses, which are far smaller. For travel in areas with viral risk, use a purifier with chemical or UV treatment.
Will it fit my water bottle?: It connects to standard bottle threads and hydration pouches, so most wide- and narrow-mouth bottles work. Test the fit before a trip.
How is it different from a LifeStraw or Sawyer Mini?: It adds a carbon stage for taste and claims a longer life, but those rivals have years of field testing and published test data. Treat LASETO's removal figures as manufacturer claims.
What comes in the box?: One filter straw. No backflush syringe, carry bag or bottle adapter is listed, so plan to clean it by backflushing with clean water from a bottle or pouch.
Can I use it for muddy or cloudy water?: The pre-filter and PP cotton layers handle some sediment, but very cloudy water clogs the membrane fast. Let sediment settle first and backflush often.
Where is the Water Filter Straw cheapest?: At Walmart, for $14.99, as of our latest check.

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