It's so annoying to have a drain stopper that doesn't keep water in the sink. This one worked well for me and was easy to use. Just push in to create a suction seal and it will keep water in your sink until your done washing up. It won't rust since it's silicone and looks more stylish than your basic drain stopper.
We used this for less than 1 week and it worked well to keep the water in the sink. It seemed to have a good seal but unfortunately the outer ridge completely separated making it impossible to use. So bummed as I really like the way it sealed.