Waterpik Promax Water Flosser vs COSLUS Water Flosser for Teeth

Both are corded countertop water flossers with BPA-free plastics and rotary or button controls. The Waterpik Promax is the better pick for gum care and for households with two regular users: it has ADA acceptance, a documented bleeding-gum study, a 20-ounce reservoir, two saved user profiles and a guided intensity ramp. The COSLUS is the better pick for large families and for anyone who wants more pressure settings and a bigger tank: 600 ml, 12 levels and a gift-set box. Owners rate both well, with the Waterpik slightly ahead on average from fewer reviews.

• Choose the Waterpik Promax if you are treating bleeding gums, want ADA-accepted gum care, or share one unit between two people who each want saved settings.
• Choose the COSLUS if you want the largest tank and the widest range of pressure settings for a family, and a gift-ready box.