Does not work.
Does not suction at all. Continuously floats up from the drain. Is there some kind of trick to get this to work? Most likely returning this.
This Moby tub stopper works so well! I have a tub that has one of those stoppers that has the little knob on it and you pull up to drain, push down to stopper (lift and turn tub drain). This Moby tub stopper fits over it in the open position with no problem! The tub stopper has to be in the open position to create a vacuum seal in order for the Moby tub stopper to work. This product is durable and seems like it will last for a while. My daughter is 14 months old and has tried to pull the Moby off of the bottom of the tub and (so far) has been unsuccessful. It's a great product and keeps from getting toes, fingers, or other body part from being injured on the tub drain and tub stopper.
It slows the flow of water out of the drain, however I would not call it a "stopper". I purchased it because it matches our skip Hop whale spout cover, which I love. I will unfortunately be returning the "slower" and purchasing something else.
The flat rubber part seems like it would work, however it is open under neath the hard plastic of the whale's head. The hard plastic sits lower than the flat rubber so the the "slower" actually sits off the floor of the tub and allows the water to drain out.