The Waterpik Aquarius WP-662 is the brand’s benchmark countertop water flosser, with ten pressure settings, a large reservoir and a rotating tip that reaches around the whole mouth. It is a common recommendation for people with braces, implants or gum concerns who want thorough interdental cleaning.
The trade-off is size: it needs counter space near a power outlet and is not travel-friendly. Once it has a home in the bathroom, though, the tank lasts a full session and the pressure range suits both sensitive and robust gums.