Question 1

Which is better, Waterpik Aquarius WP-660 or Waterpik Cordless Advanced WP-580?

Accepted Answer

Based on our testing, the Waterpik Aquarius WP-660 scores higher overall at 8.9/10. The Waterpik Aquarius WP-660 scored 8.9/10 and the Waterpik Cordless Advanced WP-580 scored 8.4/10 in our Best Water Flossers 2026 evaluation.

Question 2

Is the Waterpik Aquarius WP-660 worth it over the Waterpik Cordless Advanced WP-580?

Accepted Answer

The Waterpik Aquarius WP-660 scores 8.9/10 while the Waterpik Cordless Advanced WP-580 scores 8.4/10. The Waterpik Aquarius WP-660 is our "Best Overall" pick in the Best Water Flossers 2026 category.

Waterpik Aquarius WP-660 vs Waterpik Cordless Advanced WP-580: Which to Buy?