The Stainless Steel Universal Push-Type Bounce Core is designed with an inner well-structured basket strainer that neatly collects hairs, jewelry, dirt, and anything. It prevents the drain from clogging up. The pop-up design overturns the traditional, inconvenient drain (e.g. basic plug with chain)! Just press the top cap down gently to switch 2 modes – stopper (to keep the water) and strainer (to drain off the water).