Which Water Flosser Should You Actually Buy?

By Editorial Team | April 2026

A water flosser is one of those purchases you ignore until flossing starts feeling like a negotiation. The Waterpik Cordless Advanced 2.0 is the easy pick here because it gives you proper cleaning in a compact, shower-safe body without taking over the bathroom.

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Our picks at a glance

Pick	Product	Price	Best for
Best overall	Waterpik Cordless Advanced 2.0	£69.99	Small bathrooms, braces, implants, and daily use without a countertop unit
Best upgrade	Philips Sonicare Cordless Power Flosser 3000	£79.99	Longer sessions and a little more tank without going full countertop
Best budget	Waterpik Cordless Express	£54.97	Cheaper cordless cleaning when you can live with fewer extras

Based on hands-on research, expert review consensus (RTings, Wirecutter, relevant subreddits), and current pricing.

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Best overall: Waterpik Cordless Advanced 2.0

Waterpik Cordless Advanced 2.0 — £69.99

This is the cordless flosser that makes sense if you want something you’ll actually use every day. The 7 oz reservoir is small, but the trade is portability, shower use, and enough pressure control to handle sensitive gums as well as stubborn debris. With a score of 7.7, it lands in the “good, not gimmicky” zone.

Why we picked it:

• Three pressure settings give you room to go gentle around gum pockets and stronger where food gets stuck.
• The waterproof build means you can floss in the shower, which is the easiest way to turn this into a habit.
• Four included tips make it more flexible than bare-bones cordless rivals.

The trade-off: the tank is small, so if you want a long, meticulous whole-mouth clean, you’ll be refilling more often than you would with a countertop model.

If you want the category leader in a compact form, buy the Waterpik Cordless Advanced 2.0.

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Best upgrade: Philips Sonicare Cordless Power Flosser 3000

Philips Sonicare Cordless Power Flosser 3000 — £79.99

The extra money buys you a bigger 250 ml tank and longer runtime, so you spend less time stopping to refill. It also has a built-in timer and two cleaning modes, which makes it a better fit if you want a slightly more guided flossing routine.

Worth it if: you floss thoroughly, hate mid-session refills, and want the cordless model that feels closest to a no-fuss countertop experience without owning a countertop machine.

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Best budget pick: Waterpik Cordless Express

Waterpik Cordless Express — £54.97

This is the cheaper way into cordless water flossing if you mainly care about getting the basics done. You give up the nicer feature set and the extra polish of the Advanced 2.0, but you still get the portability and space-saving design that make cordless flossers useful in the first place.

Worth it if: you want to spend as little as possible on a cordless Waterpik and you’re fine with a more stripped-back experience.

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How we chose

We focused on the stuff that matters for real oral care: tank size, pressure control, portability, charging, and whether the machine is actually easy to stick with. We also checked current expert consensus from Wirecutter, CNET, and Electric Teeth, plus pricing and feature sets for currently available alternatives.

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Frequently asked questions

Is a water flosser better than string floss? For braces, bridges, crowns, and tight spaces, a water flosser is often easier to use consistently. It does not make string floss pointless, but it does make daily interdental cleaning less annoying.

Is the Waterpik Cordless Advanced 2.0 worth £69.99? Yes, if you want reliable cordless cleaning and you value brand trust more than chasing the lowest price. If you just want the biggest tank for the money, the Philips upgrade is the stronger value.

How often will I need to refill it? Expect roughly one focused clean per fill, around 45 seconds of runtime.

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Verdict

The Waterpik Cordless Advanced 2.0 is the one to buy if you want cordless water flossing without compromise on convenience. It is not the cheapest, and it is not the biggest, but it is the easiest to live with — and that matters more than spec-sheet bragging rights.