Product review (1 stars): Skip it.  Buy a better quality version
Its a simple piece of rubber to cover your sink drain.  Why shouldn't the cheapest one work, right?  Wrong.  I should have read the reviews below regarding its basic functionality.  Poor quality rubber so its too stiff for anything to go down without forcing it down, and somehow water doesn't even flow well so your sink fills up with grungy water.  I am looking for a higher quality one now.