The Volas Pet Chew Toy with Food Dispenser combines a chew body with a food dispenser. Interactive play is the third listed idea.
Fill it, offer it, and let movement release treats. The page does not diagram the opening or name a capacity. Stop if the toy is damaged.
It is not listed as a slow-feeder pad. Ask a veterinarian if you need diet advice.
See the toy on the Volas chew toy page.