Waterpik Aquarius WP-660

Brand: Waterpik Aquarius WP-660

The countertop workhorse of the Waterpik line: ten pressure settings from 10 to 100 PSI, roughly 1,400 pulses per minute and a 22 ounce reservoir that gives about 90 seconds of flossing per fill. Seven tips ship in the box, and for braces the two that matter are the Orthodontic Tip OD-100E with its tapered brush and the Plaque Seeker. A timer pauses at 30 seconds and again at one minute, which helps when an orthodontist asks for a full pass around every bracket.

Suits anyone treating flossing as a daily routine at a fixed sink, especially families sharing one unit with separate tips. Less suitable for small bathrooms and travel: it needs an outlet, a footprint of its own and a hose that will not fold into hand luggage. Reservoir and tip holder come off for rinsing, which is worth doing weekly.