Waterpik Water Flossers are clinically proven to be more effective than traditional dental floss and Sonicare Air Floss (Model HX8181) for reducing plaque, gingivitis, and gum disease. And it's perfect for anyone with braces or implants, and those with crowns, bridges, and veneers. Reservoir Capacity: 5 Ounces (150 mL) Product Dimensions: 5.1 x 3.5 x 8.9 inches; 0.01 Ounces Item model number: 636304 Batteries: 1 Lithium Ion batteries required. UPC: 073950258609 Manufacturer: Waterpik