Best water purifier 2025: clean water, wherever you roam

ActiveOutdoorsBest water purifier 2025: clean water, wherever you roamWe round up the best water purifiers to ensure you always have clean water on your adventuresWhen you purchase through links on our site, we may earn an affiliate commission.Here’s how it works.

We round up the best water purifiers to ensure you always have clean water on your adventures

When you purchase through links on our site, we may earn an affiliate commission.Here’s how it works.

(Image credit: LifeSaver)

best water purifier: LifeSaver Liberty purifying water bottle

(Image credit: LifeSaver)

Although most of the time we’re lucky enough to have clean water easily to hand, it’s not always that easy in the outdoors. Even if you invest in thebest hiking water bottleand make sure it’s filled up before you leave home, long days and hot weather can mean you end up water-less halfway through a hike. And that’s to say nothing of wild camping adventures and multi-day expeditions.

In cases where a drinking water tap is elusive, you’re left you with the options of either going thirsty, or drinking from local water sources. These can range from fast-flowing streams that are probably fine, through to still water and rivers that probably aren’t. While there are a few ways topurify water in the wild, perhaps the easiest is to head out armed with one of the best water purifiers. These are designed to make even the most unpalatable pondwater not only safe to drink, but improve the taste so it’s almost like you’re just drinking from your kitchen tap.

A quick note before we start. This guide is dedicated to the kind of water purifiers you’d take out and about with you. If you’re looking for the kind of thing you keep in your fridge and use to remove impurities from your local tap water, you should head to ourbest water filter jugguide instead.

What’s the difference between a water purifier and a water filter?

Why you can trust T3Our expert reviewers spend hours testing and comparing products and services so you can choose the best for you.Find out more about how we test.

A water filter will be a common sight around the home; it’ll take standard tap water and clear out unpleasant smells, often using a replaceable filter containing activated carbon. Some are connected inline with home taps to perform the same job. However, they’re not designed to tackle water that isn’t safe to drink in the first place – that’s where the water purifier comes in. A water purifier will actually clean dirty water, removing nasties such as viruses, protozoa, bacteria and cysts, none of which you really want to be drinking. Many of the best water purifiers will incorporate a carbon water filter too, which will remove any non-dangerous smell and flavour from the purified water.

The best water purifiers to buy now

(Image credit: Lifesaver)

Lifesaver Liberty water purifier bottle on blue background

T3 Best Buy badge

(Image credit: Lifesaver)

Lifesaver LibertyThe best water purifier for when you want lots and lots of clean waterOur expert review:SpecificationsBest for:group useCapacity:400mlDishwasher-friendly:noFilter type:Virus 99.999% Bacteria 99.9999% Cysts 99.99%Today’s Best DealsCheck AmazonVisit SiteReasons to buy+Super-effective filter+Portable+Very practical hoseReasons to avoid-Low storage volume-Not dishwasher safe
Lifesaver Liberty

1. Lifesaver Liberty

The best water purifier for when you want lots and lots of clean water

Our expert review:

SpecificationsBest for:group useCapacity:400mlDishwasher-friendly:noFilter type:Virus 99.999% Bacteria 99.9999% Cysts 99.99%

Best for:group useCapacity:400mlDishwasher-friendly:noFilter type:Virus 99.999% Bacteria 99.9999% Cysts 99.99%

Best for:group use

Capacity:400ml

Dishwasher-friendly:no

Filter type:Virus 99.999% Bacteria 99.9999% Cysts 99.99%

Today’s Best DealsCheck AmazonVisit Site

Today’s Best Deals

Check AmazonVisit Site

Check Amazon

Visit Site

Reasons to buy+Super-effective filter+Portable+Very practical hose

+Super-effective filter+Portable+Very practical hose

Super-effective filter

Portable

Very practical hose

Reasons to avoid-Low storage volume-Not dishwasher safe

-Low storage volume-Not dishwasher safe

Low storage volume

Not dishwasher safe

The Lifesaver Liberty is an impressive bit of kit, offering high-quality water filtration as well as a carbon filter to make even the foulest liquid into sweet-tasting nectar. The ingenious system is essentially a pump with a 400ml capacity, which you can fill from whatever source, then use the pump to force the dirty water through the filtration membranes, creating a spout of clean water. The clever bit comes in with the built-in thread, which fits a range of wide-mouth water bottles, and the ‘scavenger’ hose, which dangles down into otherwise inaccessible water. The result is a simple and compact water pump, that’ll fill as many bottles as you need for your group from whatever water you come across. Simples. The replaceable filter is good for 2,000 litres, while the carbon insert manages 100 litres before needing replacement. Head to ourLifesaver Liberty reviewto see how we got on when we tested one out.

(Image credit: Joanna Ebsworth / T3)

LARQ Bottle PureVis water bottle

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(Image credit: Joanna Ebsworth / T3)

LARQ Bottle PureVisThe best self-cleaning water purifierSpecificationsBest for:staying fresh foreverCapacity:740 or 500mlDishwasher-friendly:noFilter type:UV-C eliminates 99.999% of germs, bacteria and virusesToday’s Best DealsView at BluemercuryView at BluemercuryView at AmazonReasons to buy+Self-cleans every two hours+Neutralises germs and viruses in 60 seconds+Keeps liquids cool / hotReasons to avoid-Not cheap-Needs recharging
LARQ Bottle PureVis

2. LARQ Bottle PureVis

The best self-cleaning water purifier

SpecificationsBest for:staying fresh foreverCapacity:740 or 500mlDishwasher-friendly:noFilter type:UV-C eliminates 99.999% of germs, bacteria and viruses

Best for:staying fresh foreverCapacity:740 or 500mlDishwasher-friendly:noFilter type:UV-C eliminates 99.999% of germs, bacteria and viruses

Best for:staying fresh forever

Capacity:740 or 500ml

Dishwasher-friendly:no

Filter type:UV-C eliminates 99.999% of germs, bacteria and viruses

Today’s Best DealsView at BluemercuryView at BluemercuryView at Amazon

Today’s Best Deals

View at BluemercuryView at BluemercuryView at Amazon

View at Bluemercury

View at Amazon

Reasons to buy+Self-cleans every two hours+Neutralises germs and viruses in 60 seconds+Keeps liquids cool / hot

+Self-cleans every two hours+Neutralises germs and viruses in 60 seconds+Keeps liquids cool / hot

Self-cleans every two hours

Neutralises germs and viruses in 60 seconds

Keeps liquids cool / hot

Reasons to avoid-Not cheap-Needs recharging

-Not cheap-Needs recharging

Not cheap

Needs recharging

The LARQ Bottle PureVis is the ideal solution for anyone who tries to avoid single-use plastic water bottles for daily hydration, but can’t help noticing that sustainable, reusable water bottles tend to go a bit stale and whiffy after a few months of regular use, even if you scrub them regularly. Hailed as ‘the world’s first self-cleaning bottle and water purification system’, the PureVis uses UV-C light – via an LED in the lid – to destroy 99.99 per cent of odour-causing germs, bacteria, viruses, and other harmful bio-contaminants, which makes it perfect not only for on-the-go water purification, but also for keeping the bottle itself delightfully fresh.

There’s no escaping the fact that the LARQ Bottle PureVis is a lot more expensive than a reusable bottle, but its insulated version will keep things cold for 24 hours, which is a definite bonus, and the thought of being freed from regular scrubbing is an absolute plus, and it’s thoroughly easy to use, too.

(Image credit: LifeStraw)

LifeStraw Go 2-Stage water filter Bottle on blue background

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(Image credit: LifeStraw)

LifeStraw GoThe best water purifier for hikingSpecificationsBest for:hikingCapacity:22oz and 1LDishwasher-friendly:yesFilter type:removes 99.999999% of bacteria, 99.999% of parasites, 99.999% of microplasticsToday’s Best DealsView at Walmart(Blue)View at AmazonView at Backcountry.comReasons to buy+Complete waterbottle and filter+Simple to use+Doubles as normal bottleReasons to avoid-Requires sucking to clean water
LifeStraw Go

3. LifeStraw Go

The best water purifier for hiking

SpecificationsBest for:hikingCapacity:22oz and 1LDishwasher-friendly:yesFilter type:removes 99.999999% of bacteria, 99.999% of parasites, 99.999% of microplastics

Best for:hikingCapacity:22oz and 1LDishwasher-friendly:yesFilter type:removes 99.999999% of bacteria, 99.999% of parasites, 99.999% of microplastics

Best for:hiking

Capacity:22oz and 1L

Dishwasher-friendly:yes

Filter type:removes 99.999999% of bacteria, 99.999% of parasites, 99.999% of microplastics

Today’s Best DealsView at Walmart(Blue)View at AmazonView at Backcountry.com

Today’s Best Deals

View at Walmart(Blue)View at AmazonView at Backcountry.com

View at Walmart(Blue)

View at Walmart

(Blue)

View at Amazon

View at Backcountry.com

Reasons to buy+Complete waterbottle and filter+Simple to use+Doubles as normal bottle

+Complete waterbottle and filter+Simple to use+Doubles as normal bottle

Complete waterbottle and filter

Simple to use

Doubles as normal bottle

Reasons to avoid-Requires sucking to clean water

-Requires sucking to clean water

Requires sucking to clean water

(Image credit: Salomon)

Salomon SOFT FLASK XA FILTER water bottle on blue background

T3 Approved badge

(Image credit: Salomon)

Salomon SOFT FLASK XA FILTERThe best water purifier for trail runningSpecificationsBest for:runningCapacity:490ml/16oz 42Dishwasher-friendly:yesFilter type:removes bacteria and protozoaToday’s Best DealsView at Competitive CyclistView at Competitive Cyclist(Blue)Check AmazonReasons to buy+Lightweight, flexible flask+High flow valve+Flask shrinks as you drinkReasons to avoid-Solid bottle perhaps more durable
Salomon SOFT FLASK XA FILTER

4. Salomon SOFT FLASK XA FILTER

The best water purifier for trail running

SpecificationsBest for:runningCapacity:490ml/16oz 42Dishwasher-friendly:yesFilter type:removes bacteria and protozoa

Best for:runningCapacity:490ml/16oz 42Dishwasher-friendly:yesFilter type:removes bacteria and protozoa

Best for:running

Capacity:490ml/16oz 42

Dishwasher-friendly:yes

Filter type:removes bacteria and protozoa

Today’s Best DealsView at Competitive CyclistView at Competitive Cyclist(Blue)Check Amazon

Today’s Best Deals

View at Competitive CyclistView at Competitive Cyclist(Blue)Check Amazon

View at Competitive Cyclist

View at Competitive Cyclist(Blue)

View at Competitive Cyclist

(Blue)

Check Amazon

Reasons to buy+Lightweight, flexible flask+High flow valve+Flask shrinks as you drink

+Lightweight, flexible flask+High flow valve+Flask shrinks as you drink

Lightweight, flexible flask

High flow valve

Flask shrinks as you drink

Reasons to avoid-Solid bottle perhaps more durable

-Solid bottle perhaps more durable

Solid bottle perhaps more durable

(Image credit: MSR)

MSR guardian water fitler

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(Image credit: MSR)

MSR Guardian Gravity PurifierThe best water purifier for group expeditionsSpecificationsBest for:basecampsCapacity:10L reservoirDishwasher safe:noFilter type:viruses (99.99%), bacteria (99.9999%), protozoa (99.9%)Today’s Best DealsView at DICK’S Sporting GoodsView at Backcountry.comCheck AmazonReasons to buy+Ideal for big groups+Military grade tech+Simple to useReasons to avoid-Not portable once set up
MSR Guardian Gravity Purifier

5. MSR Guardian Gravity Purifier

The best water purifier for group expeditions

SpecificationsBest for:basecampsCapacity:10L reservoirDishwasher safe:noFilter type:viruses (99.99%), bacteria (99.9999%), protozoa (99.9%)

Best for:basecampsCapacity:10L reservoirDishwasher safe:noFilter type:viruses (99.99%), bacteria (99.9999%), protozoa (99.9%)

Best for:basecamps

Capacity:10L reservoir

Dishwasher safe:no

Filter type:viruses (99.99%), bacteria (99.9999%), protozoa (99.9%)

Today’s Best DealsView at DICK’S Sporting GoodsView at Backcountry.comCheck Amazon

Today’s Best Deals

View at DICK’S Sporting GoodsView at Backcountry.comCheck Amazon

View at DICK’S Sporting Goods

View at Backcountry.com

Check Amazon

Reasons to buy+Ideal for big groups+Military grade tech+Simple to use

+Ideal for big groups+Military grade tech+Simple to use

Ideal for big groups

Military grade tech

Simple to use

Reasons to avoid-Not portable once set up

-Not portable once set up

Not portable once set up

If you’re off on expedition to a hostile environment, where you know clean water will be in short supply, then you want the MSR Guardian Gravity Purifier in your duffle bag. It’s designed to military specifications, so rugged as they come, and it’s simple to use, thanks to the gravity element. Just hang it up, fill with filthy water, and let it percolate through the NSF protocol P248 military testing standard filter and two-stage purifier with activated carbon. You’ll get up to a litre in 2 minutes with the right setup, an impressive flow rate. While it’s not a portable system once setup, it packs down small for travel.

(Image credit: Waterdrop)

Lucy Smart Cap

(Image credit: Waterdrop)

Lucy Smart CapThe best water purifier for office or home useSpecificationsBest for:everyday hydrationCapacity:600mlDishwasher safe:noFilter type:256nm UV-C LED deactivates up to 100% of all bacteria, mould or virusesToday’s Best DealsVisit SiteReasons to buy+Fast UV purification+Useful companion appReasons to avoid-Glass makes it heavy
Lucy Smart Cap

6. Lucy Smart Cap

The best water purifier for office or home use

SpecificationsBest for:everyday hydrationCapacity:600mlDishwasher safe:noFilter type:256nm UV-C LED deactivates up to 100% of all bacteria, mould or viruses

Best for:everyday hydrationCapacity:600mlDishwasher safe:noFilter type:256nm UV-C LED deactivates up to 100% of all bacteria, mould or viruses

Best for:everyday hydration

Capacity:600ml

Dishwasher safe:no

Filter type:256nm UV-C LED deactivates up to 100% of all bacteria, mould or viruses

Today’s Best DealsVisit Site

Today’s Best Deals

Visit Site

Reasons to buy+Fast UV purification+Useful companion app

+Fast UV purification+Useful companion app

Fast UV purification

Useful companion app

Reasons to avoid-Glass makes it heavy

-Glass makes it heavy

Glass makes it heavy

We’re not sure you’d want to rely on the Lucy Smart Cap if you’re fending for yourself in the wild, however if you want an easy way to give your everyday drinking water a once-over, with the added benefit of a system to keep you hydrated, this one’s well worth checking out. The Lucy Smart Cap has a built-in UV-C LED; put it on one of Waterdrop’s water bottles, press the button and most unwanted potential germs will be dealt with in around 90 seconds. Simple and effective.

The Lucy Smart Cap records your water consumption, too, and paired with the Waterdrop Hydration app, the whole setup becomes a smart drinking assistant that monitors your hydration and reminds you when it’s time to take another sip. Find out more about our experience with the Lucy Smart Caphere.

(Image credit: Sawyer)

Sawyer mini water filter

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(Image credit: Sawyer)

Sawyer Mini FilterThe best water purifier for lightweight travelAverage Amazon review:☆☆☆☆☆SpecificationsBest for:travelCapacity:up to 100,000 gallonsDishwasher safe:noFilter type:99.99999% of all bacteria, 99.9999% protozoaToday’s Best DealsView at Amazon(Orange)View at REI.comView at Walmart(Red)Reasons to buy+Tiny+Lightweight+Lasts for agesReasons to avoid-Potentially fiddly to use-Not dishwasher safe
Sawyer Mini Filter

7. Sawyer Mini Filter

The best water purifier for lightweight travel

Average Amazon review:☆☆☆☆☆

☆☆☆☆☆

SpecificationsBest for:travelCapacity:up to 100,000 gallonsDishwasher safe:noFilter type:99.99999% of all bacteria, 99.9999% protozoa

Best for:travelCapacity:up to 100,000 gallonsDishwasher safe:noFilter type:99.99999% of all bacteria, 99.9999% protozoa

Best for:travel

Capacity:up to 100,000 gallons

Dishwasher safe:no

Filter type:99.99999% of all bacteria, 99.9999% protozoa

Today’s Best DealsView at Amazon(Orange)View at REI.comView at Walmart(Red)

Today’s Best Deals

View at Amazon(Orange)View at REI.comView at Walmart(Red)

View at Amazon(Orange)

View at Amazon

(Orange)

View at REI.com

View at Walmart(Red)

View at Walmart

(Red)

Reasons to buy+Tiny+Lightweight+Lasts for ages

+Tiny+Lightweight+Lasts for ages

Tiny

Lightweight

Lasts for ages

Reasons to avoid-Potentially fiddly to use-Not dishwasher safe

-Potentially fiddly to use-Not dishwasher safe

Potentially fiddly to use

Not dishwasher safe

The Sawyer Mini Filter is justifiably popular thanks to its long life (100,000 gallons), tiny size (65 grams) and considerable flexibility. It’ll work as a straw, to drink dirty water direct, an attachment to standard threaded bottles, or inline in a bladder-style hydration system. The long life is down to the fact that the filter can be cleaned (backwashed) with the included syringe, which will restore up to 98.5% of the filter’s flow rate. For such a tiny palm-sized device, that’s an impressive list of accomplishments. As Sawyer says: ‘A lifetime of water at hand’. Indeed.

Round up of today’s best deals

LARQ Bottle PureVis$99ViewSee all pricesLifestraw Go Water Filter Bottle$44.95$37.48ViewSee all pricesSalomon Soft Flask XA filter$49.95ViewSee all pricesMSR Guardian Gravity Purifier$299.95ViewSee all pricesSawyer Products Mini Water Filtration$28.99$21.38ViewSee all prices

LARQ Bottle PureVis$99ViewSee all prices

LARQ Bottle PureVis 17 oz -…

LARQ Bottle PureVis

Amazon

$99View

$99

See all prices

Lifestraw Go Water Filter Bottle$44.95$37.48ViewSee all prices

LifeStraw Go Series –…

Lifestraw Go Water Filter Bottle

Amazon

$44.95$37.48View

$44.95$37.48

$37.48

See all prices

Salomon Soft Flask XA filter$49.95ViewSee all prices

Salomon Soft Flask XA Filter…

Salomon Soft Flask XA filter

Competitive Cyclist

$49.95View

$49.95

See all prices

MSR Guardian Gravity Purifier$299.95ViewSee all prices

MSR Guardian Gravity Water…

MSR Guardian Gravity Purifier

Backcountry.com

$299.95View

$299.95

See all prices

Sawyer Products Mini Water Filtration$28.99$21.38ViewSee all prices

Sawyer Products SP103 MINI…

Sawyer Products Mini Water Filtration

Amazon

$28.99$21.38View

$28.99$21.38

$21.38

See all prices

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What’s the difference between a water purifier and a water filter?#

The best water purifiers to buy now#

1. Lifesaver Liberty#

2. LARQ Bottle PureVis#

3. LifeStraw Go#

4. Salomon SOFT FLASK XA FILTER#

5. MSR Guardian Gravity Purifier#

6. Lucy Smart Cap#

7. Sawyer Mini Filter#

Sign up to the T3 newsletter for smarter living straight to your inbox#

What’s the difference between a water purifier and a water filter?

The best water purifiers to buy now

1. Lifesaver Liberty

2. LARQ Bottle PureVis

3. LifeStraw Go

4. Salomon SOFT FLASK XA FILTER

5. MSR Guardian Gravity Purifier

6. Lucy Smart Cap

7. Sawyer Mini Filter

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