Waterpik Cordless Advanced WP-580

Brand: Waterpik Aquarius WP-660

A rechargeable handle with three pressure settings, four tips and a 7 ounce reservoir, good for roughly 45 seconds of continuous flossing. Waterpik rates the battery at up to four weeks per charge, and the body is sealed well enough for shower use, which solves the splashing problem that puts many brace wearers off water flossing. The kit includes an orthodontic tip, a microfiber travel bag and a two year limited warranty; it carries the ADA Seal.

The obvious pick for students, frequent travellers and anyone whose bathroom has no free outlet. The trade off is capacity: 45 seconds rarely covers a full arch of brackets, so expect a refill mid session. Top pressure also sits below the countertop Aquarius, and the magnetic USB charger ships without a wall adapter.