Shop water filters
Every system we track, in one place - with the price we last verified and a straight line to the manufacturer's store. Buttons take you to the brand's own site to buy; we don't sell or ship anything ourselves. Prices checked October 23, 2026 and shown on each card.
Not sure which one? Two minutes with the Filter Finder beats scrolling 21 systems - or start from the ranked top picks.
Countertop systems
AquaTru Classic
Countertop reverse osmosis by AquaTru.
Waterdrop K19-H
Countertop reverse osmosis with instant hot water by Waterdrop.
Frizzlife WB99-C
Countertop reverse osmosis by Frizzlife.
Sans Water Purifier
Countertop reverse osmosis with UV-C by Sans.
BOROUX Legacy 3-Gallon
Gravity countertop filter by BOROUX.
RKIN Zero Installation Purifier - AlcaPure
Countertop reverse osmosis, batch pitchers by RKIN.
iSpring RCD100
Countertop reverse osmosis with hot water and UV by iSpring.
Bluevua ROPOT
Countertop reverse osmosis with glass carafe by Bluevua.
SimPure Y7P-BW
Countertop reverse osmosis by SimPure.
Big Berkey
Gravity countertop filter by Berkey.
Multipure Aquaversa (MP750SC)
Faucet-connect countertop filter, solid carbon block by Multipure.
iSpring CKC1 Countertop
Faucet-connect countertop filter by iSpring.
Whole-house systems
Aquasana HealthShield
Whole-house tank system with PFAS media by Aquasana.
Pentair Pelican PC600
Whole-house carbon tank (1-3 bathrooms) by Pentair Pelican.
Aquasana Rhino (WH-1000)
Whole-house carbon + KDF tank system by Aquasana.
SpringWell CF1
Whole-house carbon tank system (1-3 bathrooms) by SpringWell.
Kind Water E-1000
Whole-house cartridge system by Kind Water Systems.
Express Water 3-Stage Whole House (WH300SCKS)
Whole-house 3-stage cartridge system with gauges by Express Water.
iSpring WGB32B
Whole-house 3-stage cartridge system by iSpring.
Aquasure Harmony 48,000-Grain Softener
Whole-house salt-based water softener by Aquasure.
Travel, RV & off-grid
Smaller water problems, smaller gear: the inline filter that protects an RV before the tank, the purifier bottle for travel where the tap can't be trusted, straws for the trail, and the tiny filter that runs a cottage kitchen off a gravity hose. Prices checked October 23, 2026.
Camco TastePURE RV Inline Filter (2-Pack)
The blue torpedo every RVer knows: screws onto the campground spigot and filters everything before it reaches your tank. Granular carbon + KDF media for taste, odor, chlorine and sediment (20-micron); about 3 months per filter. Listed to NSF/ANSI 42 & 53 per Camco's dealer specs - a first line of defense, not a drinking-water polish.
GRAYL GeoPress Purifier Bottle (24 oz)
Fill, press, drink: a French-press-style purifier that handles viruses as well as bacteria and protozoa - the category straws can't touch - plus particulates and many chemicals. The one to carry where tap water is genuinely untrusted. Cartridge: $29.95, about 65 gallons.
LifeStraw Peak Series Straw
Drink straight from lakes, rivers and questionable campground taps: the membrane microfilter is independently tested to US EPA & NSF P231 protocols for bacteria and parasites, and lasts up to 4,000 L. Honest limit, from LifeStraw itself: it does not remove chemicals or heavy metals.
LifeStraw Peak Series Squeeze Bottle (650 ml)
The same Peak microfilter built into a collapsible bottle: fill it anywhere, squeeze to drink or to fill a second container. The easiest format for travel days, trailheads and the RV's daypack.
Sawyer MINI Water Filtration System
A 2-ounce, 0.1-micron absolute filter rated up to 100,000 gallons with backflushing - no cartridges to replace. Drink from the pouch or straw, screw it onto a bottle, or hang it inline on a gravity hose and let it feed a cottage or camp kitchen all weekend.
Going the RV route? Start with our guide to the best countertop filters for RVs - the Camco inline filter above is the first half of that setup.
Make water exciting: fizz, flavor & electrolytes
Everything from our Make Water Exciting guide, shoppable: the carbonators, the CO2 and drops that keep them running, the packets and squeezes, and the electrolytes. This is the repeat-purchase shelf - most of it is bought again every month. Prices checked October 23, 2026.
SodaStream Terra Sparkling Water Maker
The default home fizz machine: Quick Connect CO2, snap-lock bottle, up to 60 L per cylinder. Carbonates water only - flavor goes in after, which is exactly how our guide uses it.
Drinkmate OmniFizz
The one machine that fizzes juice, tea, wine and flat soda directly, thanks to its detachable Fizz Infuser. Uses standard 60 L screw-in CO2 cylinders.
Aarke Carbonator 3
Stainless steel, lever-operated, cordless - the carbonator you leave out on the counter because it looks like sculpture. Standard screw-in CO2; water only.
Ninja Thirsti Drink System
Carbonates and flavors in a single appliance using Thirsti drops, with three fizz levels and four drink sizes. The drops are the consumable - budget for them like CO2.
SodaStream 60L CO2 Cylinder (Spare)
Every carbonator runs on these: a spare cylinder means never a flat weekend, and exchanges cost less than new. Quick Connect (pink) for Terra-class machines; screw-in (blue) for most others - match your machine.
SodaStream Drink Mixes
Pepsi, Mountain Dew, Starry, Bubly drops and SodaStream's own classics - the syrup layer for water you carbonated yourself.
Ninja Thirsti Flavored Water Drops
ZERO SODA and FRUITI CHILL drops for the Thirsti system - the repeat purchase that machine is built around.
True Lemon Packets (100 ct)
Crystallized lemon and nothing else: no sweetener, no color, about a wedge per packet. The cleanest way to make plain water taste like something - and our guide's default recommendation.
Stur Liquid Water Enhancer
Real-fruit flavors sweetened with stevia instead of sucralose, zero sugar. The middle shelf between unsweetened packets and candy-flavored drops.
MiO Liquid Water Enhancer
The original squeeze bottle: dozens of flavors, sucralose-sweetened, a few dollars each. Not the cleanest label on this page - the cheapest way to drink more water anyway.
LMNT Electrolyte Drink Mix (30 ct)
1,000 mg sodium, 200 mg potassium, 60 mg magnesium per stick - the high-dose end of the category, and the packet that puts back what reverse osmosis takes out.
Ultima Replenisher Electrolyte Mix
Six electrolytes plus trace minerals, plant-based sweeteners, a fraction of LMNT's sodium - the everyday hydration option rather than the athlete dose.
Prodyne Fruit Infusion Pitcher
A 93-112 oz acrylic pitcher with a hollow infusion rod: fill it with citrus, berries or cucumber and the fridge does the work. Zero consumables, zero cost per glass after the pitcher.
Already own one?
Replacement filters
Every cartridge, interval and annual cost for the systems above, in one table - plus the reminder tool that tells you when yours is due.
See replacements & set a reminder →Make filtered water more fun
Carbonators, squeezes, electrolytes and infusions that sit on top of clean water - our flavor picks, with the one rule that matters: filter first, flavor second.
Make Water Exciting →How buying works: "Buy" buttons go to the manufacturer's own store, where the current price, shipping and warranty terms are the brand's. Some of those links earn us a commission at no cost to you, which is how this site pays for its research - disclosed in full on our About page. Grades on this site are never for sale: several systems above carry no commission arrangement with us at all.