Countertop or cordless water flosser? Four exact models compared
Last checked 2026-09-24: specifications and tip intervals from each product's listing, nozzle compatibility from Philips' support page and the tip listings, prices from Amazon.
The two countertop models here hold up to 651 ml of water and plug in; the two cordless ones hold from 207 ml, recharge, and cost $79.96 to $99.99 against $59.96 to $59.99 for countertop, per the makers' listings. Countertop means a bigger reservoir and more settings on the bench; cordless means a small tank you can take to the sink or on a trip. Which suits you is about where and how you use it, which this page cannot decide for you.
Countertop
| Flosser | Type | Reservoir | Settings | Power | Tips in the box | Price | |
|---|---|---|---|---|---|---|---|
| Waterpik Aquarius (WP-660) White; source: the Amazon listing's product details | countertop | 651 ml (22 oz) | 10 pressure settings | plugs in (countertop) | 7 | $59.99 | Amazon › |
| Philips Sonicare Countertop Power Flosser 5000 (HX3811/20) White; source: the Amazon listing's product details | countertop | 550 ml | 2 modes, 10 intensities | plugs in (countertop) | 2 | $59.96 | Amazon › |
Cordless
| Flosser | Type | Reservoir | Settings | Power | Tips in the box | Price | |
|---|---|---|---|---|---|---|---|
| Philips Sonicare Cordless Power Flosser 3000 (HX3826/24) Mint (listing: “New Mint + 2 Nozzles”); source: the Amazon listing's product details | cordless | 250 ml | 2 modes, 3 pressure settings | rechargeable; up to 40 days per charge; USB-A cable and wall adapter included (Philips) | 2 | $79.96 | Amazon › |
| Waterpik Cordless Advanced (WP-580) White; source: the Amazon listing's product details | cordless | 207 ml (7 oz) | 3 pressure settings | rechargeable; up to 4 weeks per charge; magnetic USB charger; global voltage compatible (Waterpik) | 4 | $99.99 | Amazon › |
Only the Waterpik Cordless Advanced is described by its maker as global-voltage compatible; for the others, the listings we read do not say, so check the charger before travelling abroad.
Specifications are the manufacturers' own, as shown on each listing; capacities are converted to ml. We tested nothing and measured no pressure. This page makes no claim about gum health, plaque or any dental condition, and is not a substitute for advice from your dentist.
Which tips fit which of these, and what replacements cost: the tip compatibility page. The countertop pair head to head: Philips Power Flosser 5000 vs Waterpik Aquarius.