Main Function - This bathtub drain stopper can seal the drain pipe and save water. Safety; and environmental protection - The bucket stopper is made made of quality silicone food safe, soft, non-toxic, eco-friendly and skin-friendly. It is easy to clean and can be disinfected to boiling water. Universal Size - The maximum waterstop tub diameter of 5.12 inches, inner diameter of 2.16 inches, compatible with various types of bathtub drains, bathroom sinks, kitchen sinks or floor drains. Built-in suction cup - a small suction cup helps to clean the drain. to absorb and to prevent movement. When not in use to take up space, it can be sucked on the wall. É durable stopper: dirt-repellent, recyclable, easy to maintain, machine washable, to prevent water and bathtub toys from leaking, and to some extent to prevent undue blockage. s.