Waterpik is actually a brand name. However, I think you’re asking if it uses water instead of just air. There is a resivoir that can be filled with water or mouthwash if you so choose. You can choose the settings to shoot 1,2 or 3 burts of whatever fliud (or air) you use. You use it in-between the teeth at the gumline, just like a waterpik, and the tiny nozzle head works well to keep it in place as you move along from tooth to tooth. A friend of mine (who happens to be a dentist) recommended it to me and I LOVE IT!