Water filters
Scored on protection, flow rate, weight and ease of use.
Water filters we've scored
Membrane Solutions S1 Personal Water Filter Straw
Protection6
Flow rate2
Weight10
Ease of use7
LifeStraw Sip
Protection8
Flow rate1
Weight10
Ease of use3
HydroBlu Sidekick 3-Stage Straw Water Filter
Protection6
Flow rate1
Weight10
Ease of use3
LifeStraw Peak Series Personal Water Filter Straw
Protection8
Flow rate1
Weight9
Ease of use7
LifeStraw Peak Series Solo Water Filter
Protection8
Flow rate10
Weight10
Ease of use7
HydroBlu Versa Flow Lightweight Water Filter
Protection6
Flow rate3
Weight10
Ease of use8
Platypus DayCap In-Bottle Filter
Protection8
Flow rate4
Weight9
Ease of use9
HydraPak UltraFlask+ Filter Cap
Protection8
Flow rate4
Weight10
Ease of use8
LifeStraw Go Series 650 ml
Protection8
Flow rate3
Weight5
Ease of use7
Sawyer Mini Filter (kit with 0.5 L pouch, straw and syringe)
Protection8
Flow rate5
Weight8
Ease of use6
HydraPak 28mm Inline Filter Kit
Protection8
Flow rate4
Weight10
Ease of use7
HydroBlu MUV Nomad Water Filter Bottle
Protection6
Flow rate3
Weight5
Ease of use7
Lifesystems Water Filter Purifier Bottle (1 L)
Protection6
Flow rate3
Weight5
Ease of use7
Hydrapak Seeker+ 3L Filter Kit
Protection8
Flow rate4
Weight7
Ease of use8
LifeStraw Peak Series Collapsible Squeeze Bottle 650 ml
Protection8
Flow rate3
Weight8
Ease of use7
LifeStraw Go Series Water Filter Bottle 1 L
Protection8
Flow rate3
Weight5
Ease of use7
Katadyn BeFree AC 0.5 L Filter Bottle (slate blue)
Protection8
Flow rate7
Weight9
Ease of use9
Platypus QuickDraw 1L Filter System
Protection8
Flow rate10
Weight8
Ease of use7
LifeStraw Peak Series Collapsible Squeeze Bottle 1 L
Protection8
Flow rate3
Weight8
Ease of use8
HydraPak Flux+ 1.5 L Bottle and Filter
Protection8
Flow rate4
Weight7
Ease of use8
Katadyn BeFree AC 1.0 L Filter Bottle (slate blue)
Protection8
Flow rate7
Weight9
Ease of use8
MSR Thru-Link In-Line Microfilter
Protection8
Flow rate6
Weight9
Ease of use7
MSR TrailShot Microfilter
Protection8
Flow rate4
Weight7
Ease of use9
Platypus QuickDraw 2L Filter System
Protection8
Flow rate10
Weight6
Ease of use7
Sawyer Micro Squeeze Filter with Cnoc Premium 750 ml Pouch
Protection6
Flow rate5
Weight8
Ease of use7
LifeStraw Peak Series Compact Gravity Water Filter System 3L
Protection8
Flow rate6
Weight5
Ease of use7
Grayl UltraPress Purifier Bottle
Protection10
Flow rate10
Weight4
Ease of use8
Katadyn BeFree Gravity 3 L Water Filtration System
Protection8
Flow rate7
Weight6
Ease of use9
Grayl GeoPress Purifier Bottle
Protection10
Flow rate10
Weight2
Ease of use8
Sawyer Squeeze Filter with Cnoc Premium 2 L Bladder
Protection8
Flow rate5
Weight6
Ease of use8
Katadyn Hiker Pro Transparent Water Filter
Protection6
Flow rate4
Weight5
Ease of use7
Katadyn Vario Water Filter
Protection6
Flow rate7
Weight3
Ease of use8
MSR Hyperflow MicroFilter
Protection8
Flow rate10
Weight6
Ease of use7
Hydrapak Seeker+ 6L Gravity Filter Kit
Protection8
Flow rate4
Weight2
Ease of use8
MSR Guardian Purifier Pump
Protection10
Flow rate9
Weight2
Ease of use8
Katadyn Pocket Water Filter
Protection6
Flow rate4
Weight1
Ease of use6
Katadyn Explorer Pro Purifier
Protection6
Flow rate4
Weight1
Ease of use5
What we score
Protection
From maker's figuresWhat it removes from water, and how well that is proved.
Flow rate
From maker's figuresHow fast clean water comes through when it is new. Real flow drops as it clogs: see Ease of use.
Weight
From maker's figuresHow much it adds to your pack.
Ease of use
From reviews, or the maker's specsFilling, squeezing or pumping effort, how fast it clogs in peaty or silty water, and how easy it is to clean.
Durability
From reviews, or the maker's specsHow well the bag, housing and fittings hold up over months of use.