I'm not sure if it's the same thing, but my DD had one a few years ago. She was about 3 or 4 at the time. It wasn't a Disney one, it was just a baby doll that you filled up with some water, and it was soft and squishy, like a baby. It kind of moved around a bit, if that makes sense. It was supposed to make the baby doll feel real.
I think I ended up throwing it away after awhile because I figured all that water sitting it in it couldn't have been that good. (She would take it in the tub with her and we would "drain" the baby, but not everything would come out.) She did enjoy playing with it though. Hope this helps!