Buying guide
The best water flossers in 2026
Updated Aug 30, 2026 · prices dated per offer
A water flosser flushes water between teeth and along the gumline at an adjustable pressure. It does not replace string floss or brushing, and none of the mechanism-level cleaning it does should be confused with a medical treatment, whatever a manufacturer's own study claims about it.
We compared a full-size countertop model, a cordless model from the same brand, a cordless model from Philips Sonicare, and a budget cordless pick, looking at tank size, pressure range, what tips come in the box, and what those tips cost to replace.
Water flossers: all 4 products we track, with dated prices →
| Spec | Waterpik Aquarius WP-660 | Waterpik Cordless Advanced 2.0 WP-580 | Philips Sonicare Power Flosser 3000 | Aquasonic Precision Cordless Water Flosser |
|---|---|---|---|---|
| Best price | $99.99 at Waterpik | $99.99 at Waterpik | $79.99 at Target | $36.99 at Target |
| Checked | ✓ AUG 30 | ✓ AUG 30 | ✓ AUG 30 | ✓ AUG 30 |
| Shopper rating | 4.62,853 ratings | 4.12,344 ratings | 3.9220 ratings | 4.7260 ratings |
| Type | Countertop, corded, plug-in | Cordless, handheld, rechargeable | Cordless, handheld, rechargeable | Cordless, handheld, rechargeable |
| Pressure range | 10 settings on Waterpik's PRECISIONPULSE pump (PSI not published) | 3 settings on Waterpik's PRECISIONPULSE pump (PSI not published) | 3 water pressure levels across Clean and Deep Clean (Pulse Wave) modes | 5 modes with 8 adjustable pressure levels (PSI not published) |
| Reservoir | 22 oz (651 ml), Waterpik rates it at 90+ seconds of flossing time per fill | 7 oz (207 ml), Waterpik rates it at up to 45 seconds of flossing time per fill | 250 ml (about 8.45 oz) | 290 ml, Target lists up to 2 minutes of continuous flossing per fill |
| Tips included | 7: 4 Precision, 1 Orthodontic, 1 Pik Pocket, 1 Plaque Seeker | 4: 2 Precision Handheld Cordless, 1 Orthodontic, 1 Plaque Seeker | 2: 1 F1 Standard Jet tip, 1 F3 Quad Stream tip | 2 Standard flossing tips |
| Tip replacement | Waterpik recommends every 3 to 6 months; a 4-pack of Precision tips runs about $10 to $13 at most retailers | Waterpik recommends every 3 to 6 months; a 4-pack of Precision tips runs about $10 to $13 at most retailers | Target lists replacement F1/F3 tip packs at about $12.99 to $14.99; Philips does not publish a fixed replacement interval | No manufacturer interval published; replacement tip packs are not listed separately by Aquasonic on this page |
| Battery | None, corded, plugs into a wall outlet (120VAC/60Hz, North America only) | Rechargeable lithium-ion, 4.86 Wh, Waterpik rates it at up to 4 weeks per charge; charges in about 4 hours via magnetic USB-A cable | Rechargeable lithium-ion, Philips rates it at up to 40 days on one 1-minute session per day; charges via USB-A cable and wall adapter | Rechargeable, brand rates it at up to 40 days per charge; charges via USB cable |
| Dimensions | 10.35 x 4.70 x 3.80 in, 1.46 lb (Waterpik's listed unit dimensions) | 11.60 x 2.80 x 4.00 in, 0.80 lb (Waterpik's listed unit dimensions) | 9.72 in overall length | 12 in overall length, about 1.08 lb shipping weight |
| Warranty | 3-year limited warranty (Waterpik) | 2-year limited warranty (Waterpik) | 2-year limited warranty (Philips) | 1-year limited warranty |
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Best overall
1. Waterpik Aquarius WP-660
The Aquarius WP-660 has the largest tank in this lineup at 22 oz, plus 10 pressure settings and seven tips in the box covering orthodontic and periodontal-pocket use, more variety than any cordless model here offers out of the box.
It was $99.99 at Waterpik.com, price checked 2026-08-30. It is corded and countertop-only, so it needs a fixed spot near an outlet, and Waterpik says to replace the tips every three to six months, an ongoing cost on top of the unit price.
Skip it if: you need something that travels or fits a small bathroom; the Cordless Advanced 2.0 below is built for that instead.
Best cordless
2. Waterpik Cordless Advanced 2.0 WP-580
The Cordless Advanced 2.0 is waterproof, works in the shower, and Waterpik rates the battery at up to four weeks per charge, which is what makes it suited to travel or a bathroom with no room for a corded unit.
It was $99.99 at Waterpik.com, price checked 2026-08-30, the same price as the corded Aquarius despite a smaller 7 oz tank and only three pressure settings, so you are paying for portability, not more tank or pressure range.
Skip it if: the flosser has a permanent spot near an outlet already; the corded WP-660 gives more tank and pressure range for the same price.
Best for two cleaning modes
3. Philips Sonicare Power Flosser 3000
The Power Flosser 3000 pairs a constant-pressure Clean mode with a Pulse Wave Deep Clean mode on one cordless handle, and Philips rates the battery at up to 40 days on daily one-minute use.
It was $79.99 at Target, price checked 2026-08-30, cheaper than either Waterpik model here, but its 250 ml tank is the smallest in this lineup and its 3.9 out of 5 average rating at Target, from 220 reviews, is the lowest of the four.
Skip it if: tank size or user ratings matter more to you than mode variety; the Waterpik Aquarius scores higher on both.
Best budget
4. Aquasonic Precision Cordless Water Flosser
The Precision costs under half of the name-brand cordless models here while still offering 8 pressure levels across 5 modes and an IPX7 waterproof rating.
It was $36.99 at Target, price checked 2026-08-30, and it holds Target's highest rating in this comparison at 4.73 out of 5 from 260 reviews. The tradeoff is a 1-year warranty, half of Waterpik's cordless warranty, and no published tip replacement program the way Waterpik and Philips have.
Skip it if: you want a documented long-term tip supply and a longer warranty; the Waterpik and Philips models both publish clearer replacement programs.
Common questions
Which water flosser has the biggest tank?
The Waterpik Aquarius WP-660 does, at 22 oz. That is roughly three times the tank size of the cordless models in this comparison, which run 250 to 300 ml (about 8.5 to 10 oz).
Which one is cheapest?
The Aquasonic Precision was the cheapest we checked, $36.99 at Target on 2026-08-30, less than half the price of the two Waterpik models.
Do any of these whiten teeth or treat gum disease?
No. All four work the same way, by flushing water between teeth and along the gumline at an adjustable pressure. Waterpik and Philips both cite their own lab and clinical studies claiming better plaque and gum-health results than string floss, which are manufacturer-attributed results, not independent guarantees, and none of the four whitens teeth or treats existing gum disease.
Do I need to buy replacement tips separately?
Yes, eventually. Waterpik and Philips both recommend replacing tips every few months, and packs typically cost ten to fifteen dollars. The Aquasonic budget pick does not publish a replacement interval or sell tip packs on its Target listing, which is worth weighing against its lower price.