Patent: Pet display vest

United States Patent: 5,901,666: "A vest or belt is integrally formed with tubular, pet receiving passageways which extend around the wearer's body and terminate in pocket-like chambers for feeding and retrieval. Outer wall portions of the passageways are transparent so that a pet moving along the passageways can be seen by a spectator. Graphics or indicia depicting the pet's habitat or a pet story are marked on the vest and extend across portions of the passageways masking delineations or depicting the passageways as burrows."

Thanks to IEEE Spectrum for a pointer to this.