Waterpik sells more than a dozen water flossers, and the model names are confusing. Start with where you will floss: an outlet by the sink points to the Aquarius, our pick for most people; no outlet points to the ION; the shower points to the Pulse 3100. The Gem 5100 and the Cordless Express cover two narrower cases, a longer-lasting handheld tank and AA batteries. If you need a tip for braces, implants or gum pockets, check which tips fit before you buy. Deciding between brands rather than models? Our best water flosser roundup compares Waterpik with Philips Sonicare and others.
Evidence Receipt
- The independent evidence is modest. Cochrane’s 2019 review (35 trials in all, 5 of them comparing water flossers with brushing alone) rated the evidence on water flossers low to very low certainty: a possible drop in gum inflammation at one month that did not hold at three or six months, and no clear cut in plaque or bleeding compared with brushing alone.
- Against other ways of cleaning between teeth, water jets rank well. A 2018 network analysis of 22 trials, funded by the US National Institutes of Health, ranked water jets second only to interdental brushes for reducing gum inflammation, with floss and toothpicks last.
- The ADA presents them as an option. The ADA’s consumer site says water flossers with its Seal remove plaque and help reduce gingivitis, and suggests them for people who have trouble flossing by hand or have braces or bridges.
- The Seal covers product lines. ADA’s records list a Waterpik Countertop Family and Waterpik Cordless Water Flossers without model numbers; the Promax WF23 is the one Waterpik flosser ADA lists by model number.
- The “99.9%” on Waterpik’s product pages is a lab figure. It traces to a lab test on slices of extracted teeth sprayed for 3 seconds, not a study in people’s mouths, and most of the trials Waterpik cites were co-authored by its own research director.
Waterpik Aquarius: Editor’s Pick
Waterpik Aquarius Water Flosser (WP-660)
Best for: Most people with an outlet by the sink, and anyone a hygienist sent for full countertop control
- 10 pressure settings, plus a Hydro-Pulse massage mode
- 22 oz tank, about 90 seconds of flossing
- 7 tips: 4 Precision, Orthodontic, Pik Pocket, Plaque Seeker
- Timer and pacer, 3-year warranty
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Why We Recommend It
In the Reddit threads we read, the Aquarius is the model dental professionals name most often: seven commenters across four r/DentalHygiene threads, four with hygienist flair and three who say they are hygienists, name it first or alone. One flaired hygienist sums up the view: “The Waterpik Aquarius is usually my go-to recommendation.” The reasons are the ones countertop units have over handhelds: 10 pressure settings, so you can start very gently and work up, and a 22 oz tank that Waterpik says lasts about 90 seconds, enough for most people to finish without a refill.
Wirecutter’s testers placed it runner-up to the ION Professional, the model before today’s ION, and called it “just as impressive as the Ion Professional”; we put it first for its owner record: only 3% of its ratings are one star, and its record is the deepest of any Waterpik on Amazon: 4.6 stars across 158,746 ratings since 2013, shared only by its own colour versions (WP-662, WP-663, WP-667). The box holds seven tips, including the Orthodontic tip for braces, the Pik Pocket for gum pockets and the Plaque Seeker for implants, crowns and bridges, and Waterpik backs it for three years. At around $100 it costs about $30 less than the ION.
Key Features
- 10 pressure settings, floss and Hydro-Pulse massage modes
- 22 oz (651 ml) tank, about 90 seconds a fill
- Timer and pacer, LED indicators
- 7 tips: 4 Precision, Orthodontic, Pik Pocket, Plaque Seeker
- 3-year warranty, North America voltage only (120V)
Who It’s Best For
Anyone with an outlet within reach of the sink, and especially people sent home with a water flosser for gum disease or braces: the fine pressure steps and the specialty tips are what countertop units do best. It also suits a household that shares one unit, since each person can keep their own tip.
Potential Downsides
It needs counter space next to an outlet, and one r/Invisalign owner of a full-size Waterpik (model not named) wrote that “the hose is wayyy to short.” It is a 120-volt unit: Waterpik’s support team says using it on other voltages, even with a converter, damages it and voids the warranty, so it is not one to take abroad. Like every countertop, it splashes while you learn; lean over the sink and close your lips around the tip.
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Waterpik Promax: Best Small and Quiet Countertop
Waterpik Promax Countertop Water Flosser (WF-23)
Best for: Small counters and new users who want the pressure to step up for them
- 10 pressure settings plus SmartAdvance, which steps intensity up over two weeks
- 20 oz tank, 90+ seconds of flossing
- 15-second timer, two saved user profiles
- Global voltage (100–240V), 3-year warranty
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Why We Recommend It
The Promax is one of Waterpik’s newest countertops, first listed on Amazon in February 2026, and Waterpik sells it as its “Small and Quiet” countertop. It stands about 8 inches tall against the Aquarius’s 10, and Wirecutter’s testers found it “quieter and slimmer than our countertop picks, but its water stream didn’t feel any more powerful.” Its SmartAdvance mode raises the intensity step by step over two weeks, which matches the advice hygienists give new users to start low and work up.
It is also the one Waterpik flosser the ADA lists by model number: the Promax WF23 has its own Seal entry, where other Waterpik flossers sit under family entries. It runs on 100 to 240 volts, keeps settings for two people, and ships with five tips, including an Implant Denture tip the Aquarius lacks.
Key Features
- 10 settings and SmartAdvance mode
- 20 oz (591 ml) tank, 90+ seconds a fill
- 15-second timer for each part of the mouth, two user profiles
- 5 tips: 2 Precision, Plaque Seeker, Orthodontic, Implant Denture
- Global voltage, 3-year warranty
Who It’s Best For
Small bathrooms, households where someone flosses while others sleep, and first-time users who would rather the flosser handle the slow pressure build-up. Its voltage range also makes it a countertop you can take abroad.
Potential Downsides
Waterpik lists it at $150, about $50 more than the Aquarius, and Wirecutter’s testers said its stream didn’t feel any more powerful, so the extra money buys size, quiet and features, not a stronger stream. Its 670 ratings since February are a much thinner record than the Aquarius’s, so there is little long-term reliability data yet, and about 1 in 10 of its written reviews are not verified purchases, most of them from its first months on sale. It has no massage mode.
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Waterpik ION: Best Cordless Countertop
Waterpik ION Rechargeable Water Flosser (WF-31)
Best for: Bathrooms with no outlet near the sink, for people who want countertop settings without a cord
- 10 pressure settings on a rechargeable base
- 22 oz tank, about 90 seconds
- Up to 4 weeks a charge over USB-C, global voltage
- 5 tips, including Implant Denture and Pik Pocket
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Why We Recommend It
“Cordless” covers two very different kinds of Waterpik, and the ION is the easy one to miss: a countertop unit with a battery in the base. You get the same 10 settings, the same 13 ounces a minute of flow and the same 22 oz tank that Waterpik lists for the Aquarius, and no cord to the wall. Waterpik quotes up to four weeks a charge.
This is the second ION. The WF-31 arrived in August 2026 as the newer version of the ION Professional (WF-12), which Amazon no longer has in stock, and most of what owners and reviewers have said is about that earlier model. One r/DentalHygiene owner put it this way: “The ion is a full size unit that is rechargeable and has just as much power as the the Aquarius.” Wirecutter’s testers chose the ION Professional as their top countertop flosser, “citing its superior cleaning action and space-saving design.” Waterpik lists the same flow and pulse rate for the new model, and adds a noise-control design it calls QuietPulse, USB-C charging and a slightly larger tank (22 oz against 20).
It suits the many bathrooms where the outlet is not near the sink, and because Waterpik rates it for global voltage it can travel. It ships with five tips, including Implant Denture and Pik Pocket, and carries a 3-year warranty. At around $130 it costs about $30 more than the Aquarius, so the extra money buys the battery, not a cleaning upgrade.
Key Features
- 10 pressure settings, 1,300 pulses a minute
- 22 oz (651 ml) tank, about 90 seconds a fill
- Lithium-ion battery, USB-C charging, up to 4 weeks a charge
- 5 tips: Precision, Orthodontic, Pik Pocket, Plaque Seeker, Implant Denture
- Timer and pacer, global voltage, 3-year warranty
Who It’s Best For
People with no outlet by the sink who still want countertop control, and anyone who wants one full-size unit for home and travel.
Potential Downsides
Its record is thin: 58 Amazon ratings since August 2026, averaging 4.1 stars, which ties the Gem 5100 for the lowest rating here, with 7% at one star. The earlier ION drew a complaint worth checking against this one: two of its owners on r/DentalHygiene reported the on/off switch failing (“The on and off switch has broken on mine”), and one says Waterpik replaced theirs. None of the eight written reviews on this one’s listing reports that so far. One owner found the power button too easy to knock on in a suitcase, with no lock to stop it, and another objects that the battery cannot be replaced. It costs about $30 more than the Aquarius, comes with five tips where the earlier ION had seven, has no massage mode, and charges over a USB-C cable with no wall plug in the box.
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Waterpik Cordless Pulse 3100: Best Handheld
Waterpik Cordless Pulse 3100 Water Flosser (WF-20)
Best for: Shower flossers, and anyone who wants a low-cost rechargeable Waterpik
- 2 pressure settings, 1,700 pulses a minute
- 6 oz tank, about 45 seconds
- Up to 9 weeks a charge, USB-C, global voltage
- Shower-safe, 2-year warranty
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Why We Recommend It
A handheld trades power control for something that matters just as much: getting used. One flaired hygienist on r/DentalHygiene says “Most patients wish they got the cordless because the splatter while learning how to use it ends up being a deterrent,” and another prefers “the handhelds in the shower for kids.” The Pulse 3100 is the handheld we would buy: Waterpik lists it at up to nine weeks a charge, tied with the Gem 5100 for the longest of our picks, it charges over USB-C, it is shower-safe, and it carries a 2-year warranty.
It is an Amazon-exclusive model, launched in December 2023, with 4.2 stars across 15,531 ratings shared only by its colour versions, at a list price of about $50.
Key Features
- 2 pressure settings
- 6 oz (177 ml) tank, about 45 seconds a fill
- Lithium-ion battery, USB-C charging, up to 9 weeks a charge
- 1 Precision tip and 1 Tongue Cleaner
- Shower-safe, global voltage, 2-year warranty
Who It’s Best For
People who would floss in the shower or not at all, and anyone who wants a light unit that lives in a drawer. One hygienist prefers handhelds in the shower for kids; Waterpik’s instructions say children using it should be supervised, and braces wearers will need to add an Orthodontic tip.
Potential Downsides
Two settings is the least control a Waterpik offers, and with a 6 oz tank you may need to refill mid-session. Handheld owners on Reddit report losing suction when the unit is tilted and pressure fading as the battery runs down. The box has no orthodontic tip; Waterpik lists its Orthodontic tip as fitting this model, so braces wearers can add one (see the tip section below). Its pulse can feel odd at first.
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Waterpik Cordless Gem 5100: Best Handheld for Longer Sessions
Waterpik Cordless Gem 5100 Water Flosser (WF-27)
Best for: Handheld users who want a tank that lasts a full minute, a travel lock and an orthodontic tip in the box
- 7 oz tank, about 60 seconds a fill
- Up to 9 weeks a charge, USB-C
- Travel Mode lock and travel bag, shower-safe
- 3 tips: Precision, Orthodontic, Plaque Seeker
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Why We Recommend It
Running out of water mid-session is a recurring handheld complaint on Reddit, and the Gem 5100 has the longest-lasting tank of the handhelds we picked: Waterpik says about 60 seconds a fill, against 45 for the Pulse 3100 and 30 for the Express. It matches the Pulse’s nine weeks a charge over USB-C, adds a Travel Mode lock so it cannot switch on in a bag, and ships with a travel bag and three tips, including the Orthodontic and Plaque Seeker tips the Pulse leaves out. The tip head spins 360 degrees, and Waterpik backs it for two years.
Key Features
- 2 pressure settings
- 7 oz (207 ml) tank, about 60 seconds a fill
- Lithium-ion battery, USB-C charging, up to 9 weeks a charge
- Travel Mode lock, travel bag, shower-safe
- 3 tips: Precision, Orthodontic, Plaque Seeker
- 2-year warranty
Who It’s Best For
Handheld users who keep running dry before they finish, braces wearers who want the orthodontic tip in the box, and travelers.
Potential Downsides
It is new: its Amazon listing first went up in April 2026, so its 4.1 stars rest on 452 ratings, a thin record next to the Pulse’s 15,531. About a quarter of its earliest reviews are unverified purchases, and we found no owner discussion of it on Reddit yet. It still has only two settings, and at around $80 it costs well above the Pulse’s list price, so buy it for the tank and the tips rather than for cleaning power.
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Waterpik Cordless Express: Best for No Charging
Waterpik Cordless Express Water Flosser (WF-02)
Best for: Travelers and anyone who would rather swap AA batteries than keep track of a charger
- Runs on 3 AA batteries, included
- 2 pressure settings
- 5 oz tank, about 30 seconds
- Shower-safe, 1-year warranty
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Why We Recommend It
The Express is the pick here with nothing to charge: three AA batteries, which Waterpik says last one to two months. That makes it the simplest travel flosser on this page, with no cable to pack and no voltage to check, at around $35. It has been on Amazon since 2018 and holds 4.2 stars across 49,707 ratings.
Key Features
- 3 AA batteries (included), replaced every 1 to 2 months per Waterpik
- 2 pressure settings
- 5 oz (148 ml) tank, about 30 seconds a fill
- 2 Precision tips
- Shower-safe, 1-year warranty
Who It’s Best For
Frequent travelers, a spare for a second bathroom or the office, and anyone who has lost one charger too many. For more travel options across brands, see our best portable water flosser picks.
Potential Downsides
Its 5 oz tank lasts about 30 seconds, the shortest on this page, so plan on refilling. It has two settings, two tips and a 1-year warranty, the shortest of the six. One r/DentalHygiene poster with gingivitis gave it up “because it felt kind of harsh on my gums”; Waterpik itself points people with sensitive areas to the extra-low settings on its countertops. Batteries are an ongoing cost.
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Aquarius vs. Ultra: What the Extra Money Buys
Buyers on Reddit ask this one, and Waterpik’s own compare page answers it. The two share the same flow rate (13 ounces a minute), the same 1,400 pulses a minute, the same 10 pressure settings, the same 22 oz tank and the same 3-year warranty. What the Aquarius adds is a massage mode, a timer and pacer, LED indicators and more tips (seven against five). What the Ultra adds is an Implant Denture tip in the box and global voltage, where the Aquarius is 120-volt only. Waterpik’s own list price for the Ultra is $30 below the Aquarius’s.
A commenter on r/DentalHygiene who says they are a hygienist read Waterpik’s earlier comparison of the Aquarius and the older WP-100 Ultra in 2024 and reached the same view: “The Aquarius has a massage mode and timer/pacer. I don’t think either of these are too important.”
So why no Ultra card? On Amazon US today, the current Ultra (WF-100) is sold by a third-party seller with no ratings of its own; the “4.3 stars” shown near it belongs to a protection plan. The older WP-100 is sold only by resellers. If you can buy an Ultra from Waterpik or a store you trust, it has the same flow, pulse rate and settings as the Aquarius for less; on Amazon, the Aquarius is the safer buy.
Countertop or Cordless?
Waterpik’s countertop-vs-cordless guide sets out the trade: countertops offer “up to 10 settings, from extra low to extra high,” while handhelds offer 2 or 3, and a countertop runs 60 to 90+ seconds a fill against 30 to 45 for a handheld (the newer Gem 5100 is rated at about 60). Waterpik’s support team puts its countertop range at 10 to 100 psi and its cordless models at 45 to 75 psi, so a countertop goes both gentler and stronger.
Owners and professionals on Reddit split along that line. In 13 of the threads we read, countertops, the Aquarius first, are favoured for pressure control and a tank that lasts the session. “I will always recommend a full size (counter top) model of a water flosser over a cordless model any time any day,” one flaired hygienist wrote. But three flaired hygienists send patients to cordless units because they get used: less splatter, shower use, and no fight for counter space. Handheld owners name the drawbacks in 6 threads: refilling mid-session, losing suction when tilted, pressure fading as the battery runs down, and only two or three settings.
The ION sits between the two: countertop settings and tank, no cord. If you have the outlet and the space, a countertop gives you more control; if a countertop would stay in the box, buy the handheld you will use.
Waterpik’s Current Range, and Where Each Model Stands
Waterpik’s range changes often, and Amazon carries some models under listings that are new, borrowed or resold. This is how each current model looked on Amazon US when we checked.
| Model | Type | Why it is or isn’t a pick |
|---|---|---|
| Aquarius WP-660 (and WP-662/663/667 colours) | Countertop | Our Editor’s Pick |
| Promax WF-23 | Countertop | Picked: smaller and quieter, new in 2026 |
| Ultra WF-100 / WF-112 | Countertop | Same flow, pulse rate and settings as the Aquarius, but sold on Amazon by a third party with no ratings of its own |
| Ultra WP-100 (older) | Countertop | Replaced by the WF-100, per Waterpik; resellers only |
| Evolution WF-33 | Countertop | New in September 2026, no Amazon ratings yet |
| Aquarius Professional WP-670 | Countertop | Waterpik sells it through dental offices; on Amazon only through small resellers |
| Ultra Plus WF-150, Nano Plus WP-320 | Countertop | Sold by Waterpik, not found on Amazon US |
| ION WF-31 (USB-C) | Cordless countertop | Picked: new in August 2026 |
| ION Professional WF-12 | Cordless countertop | The earlier ION; unavailable on Amazon US when we checked |
| Cordless Advanced 2.0 WP-580 | Handheld | Its Amazon listing dates to 2016 and its ratings include the first-generation WP-560, so we can’t read the 2.0’s own record |
| Cordless Pulse 3100 WF-20 | Handheld | Picked |
| Cordless Gem 5100 WF-27 | Handheld | Picked: the longest-lasting tank of our handheld picks |
| Cordless Enhance WF-21, Cordless 1000 WF-29, Cordless 1200 WF-36, Cordless Select WF-28 | Handheld | Listed on Waterpik’s site; not found on Amazon US when we searched |
| Cordless Pearl WF-13 | Handheld | Not shower-safe, and costs more than the Pulse for less battery |
| Cordless 1100 WF-30 | Handheld | Like the Pulse with one tip, a third of the battery life and half the warranty |
| Cordless Plus 5000 WF-26 | Handheld | New in October 2026; the rating shown on its page belongs to a protection plan |
| Cordless Express WF-02 | Handheld (AA) | Picked |
| Sensonic Complete Care CC-04 | Flosser + toothbrush base | No owner discussion found on Reddit, and no independent review read |
| Sonic-Fusion 2.0 SF-04 | Flossing toothbrush | Its recent written Amazon reviews run far below its earlier ones, and a flaired dentist on Reddit rates it below a separate brush and flosser |
| Sidekick, Cordless Slide, Cordless Freedom, Cordless Plus WP-450, Cordless WP-360, ION WF-11 | Various | Discontinued in 2026, per Waterpik |
Waterpik’s discontinued-products page names a similar current model for most retired ones.
Which Tips You Need
Waterpik tips are not universal, and the specialty tips do not fit every model. Our Waterpik tip fitment page maps Waterpik’s own compatibility lists; the short version:
- Braces: the Orthodontic tip. It comes with the Aquarius, Promax and ION, and Waterpik lists it for most handhelds too, the Pulse 3100 and Express included. Our best water flosser for braces page goes further.
- Implants, crowns and bridges: the Plaque Seeker, which Waterpik lists for most countertops and handhelds. The Implant Denture tip is listed for countertops only.
- Gum pockets: the Pik Pocket, which Waterpik lists for countertops only. Waterpik says on its Pik Pocket page that the tip needs precise placement and the lowest pressure possible; one r/DentalHygiene poster with deep pockets found they had to turn the power right down to use it.
What Breaks, and the Warranty
Durability complaints hit both kinds of flosser. Countertop owners report cracked hoses, and one found the handle could not be opened to fix it; handheld owners report batteries that stop charging anywhere from a few weeks to about two years in. That matters because Waterpik lists the batteries in the ION, Pulse 3100 and Gem 5100 as not replaceable, so a dead battery means a new flosser. The switch was the earlier ION’s named weak point; the current model is too new to judge. A flaired hygienist offers the counterweight: “Most people I know have waterpiks that will outlive them.”
Waterpik’s warranties run 3 years on the countertops here, 2 years on the Pulse 3100 and 1 year on the Express. Its warranty terms cover products bought new in unopened packaging, exclude products resold after their first retail sale and tips, and are voided by use on the wrong voltage. Buy new from a store that sells it new, and keep the receipt.
How We Researched This Page
We read Waterpik’s own spec tables, compare pages and support articles for every model on this page and most of the rest of the range, the ADA Seal list, and the independent research on water flossers. We read 87 Reddit threads in full, mostly from r/DentalHygiene, and set aside Waterpik’s own account and posts that read like promotion. We checked each Amazon listing’s rating pool, and left out models whose ratings belong to an older model or to a protection plan. We did not test these flossers hands-on.
Community vs. Evidence
| Topic | What Reddit says | What the evidence says |
|---|---|---|
| Does it replace floss? | Commenters in 6 threads, flaired hygienists among them, say keep string floss too | Cochrane rates water flosser evidence low to very low certainty; the ADA calls them an option for people who struggle with floss |
| Countertop or cordless | Countertop favoured for control in 13 threads; cordless for actually using it in 7 | Waterpik lists 10 settings and 60–90+ seconds for countertops, 2–3 settings and 30–45 seconds for most handhelds |
| Pressure | Start low and work up (4 threads), but professionals disagree on how high | Waterpik says all its settings are “safe and effective” and points people with sensitive areas to a countertop’s extra-low settings |
| The 99.9% claim | Not raised in the threads we read | A 3-second lab test on slices of extracted teeth |
Setting It Up Right
- Start low. “You can start out on a lower number and gradually increase the pressure over a few weeks,” one flaired hygienist advises. Professionals on Reddit disagree on how high to go, so ask your hygienist for a number if you have gum disease.
- Control the splash. Waterpik’s how-to page says to lean over the sink, put the tip in your mouth before you turn the unit on, and let the water flow from your mouth into the sink; its quick-start guides add closing your lips enough to stop the splashing.
- Mouthwash, sparingly. Waterpik’s mouthwash guidance allows up to a 1:1 mix with warm water, followed by a plain-water run. It rules out concentrated essential oils that don’t dissolve in water, iodine, baking soda, and salt water in cordless handhelds, and says standard or antiseptic mouthwash in the tank is “not clinically evaluated to determine any benefits beyond using water alone”; it notes studies supporting chlorhexidine, a prescription rinse your dental professional would dilute for you.
- Keep it clean and dry. Empty the tank after use and let it dry. Waterpik’s Aquarius page says to clean a flosser monthly: soak the tip in a 1:2 vinegar-water mix for 5 minutes, wash the reservoir, then run the same mix through the unit followed by clean warm water. Mold comes up in the threads: one r/DentalHygiene commenter wrote that a classmate “cracked open the handpiece on her waterpik and it was just filled with black mildew, owned it for less than a year.” Waterpik says to replace Precision tips every six months and bristled tips, such as the Orthodontic and Plaque Seeker, every three; tips are not covered by the warranty.
Frequently Asked Questions
Which Waterpik do dentists and hygienists recommend most?
In the Reddit threads we read, the Aquarius: hygienists name it first more often than any other model. That is a preference for pressure control and tank size, not a durability verdict, and several hygienists recommend handhelds to patients who would not use a countertop.
Do I still need to use string floss with a Waterpik?
The professionals in the threads we read say yes. “I love waterpiks but I would never tell someone they can skip flossing,” one flaired hygienist wrote. The ADA presents water flossers as an option for people who find string floss hard, and our water flosser vs. floss comparison sets out the studies. If you clean with interdental brushes, see our best interdental brushes picks.
Is a cordless Waterpik as strong as a countertop?
Waterpik says the ION is: it lists the same settings and flow as the Aquarius, with a slightly lower pulse rate (1,300 a minute against 1,400), and its support team gives 100 psi at the top setting. Handhelds are not: Waterpik’s support team puts them at 45 to 75 psi against 10 to 100 for countertops, with two or three settings instead of ten.
Can I use my Aquarius abroad?
No. It is a 120-volt unit, and Waterpik says using it on other voltages, even through a converter, damages it and voids the warranty. The Promax and Ultra are rated for 100 to 240 volts (you may still need a plug adapter), the ION charges over USB, and the Express runs on AA batteries.
Is the Sonic-Fusion toothbrush-and-flosser combo worth it?
Only if counter space is the problem. A flaired General Dentist on r/askdentists who owns one called it “meh” and wrote that it “takes a good waterpik and melds it with an extremely weak and below average electric toothbrush,” and a commenter who says they work as a hygienist at a periodontal office says the combo “is not nearly as effective as the solo units” for people with bone loss or deeper pockets. Its recent written Amazon reviews also run well below its earlier ones. A separate flosser and electric toothbrush is the safer buy: see our best Sonicare toothbrush and best Oral-B electric toothbrush picks.
Can I put mouthwash in my Waterpik?
Yes, up to half and half with warm water, then run plain water through it. Waterpik says ordinary mouthwash in the tank has not been shown to add any benefit over water alone.