I bought the BrakeFast bowl, recommended by many, but it did not work too well for her. Her face is small enough she is able to get her snout down in the bowl or she would tip it over.
She is slowing down a little naturally on her own. And I think the bowl does make her work a little harder for her food so she is slowed down in that sense. She still finishes her 1/2 cup in about 15-20 seconds flat!