I received the 2-in-1 Silicone Sink Strainer and Stopper to review. It fits perfectly in our sink drains, ready to stop up the water flow with a quick twist of the center knob. It held the water for over an hour without any drainage,  for over an hour, before releasing the water. 

It is pretty easy to remove the cup & to add it back on. Just make sure that you keep the cup nearby, if you leave it on (as my husband did), it takes a bit longer to fully drain, plus if any food does get stuck in it, it's a little gross to pull off the cup and have a glob of stuff to clean out of it. It would be nice to have some sort of indicator whether the cup is attached or not (because we're the kind of people who always leave the drain strainer/stopper in the sink). But besides that, this product worked like a charm!