Oscar can also become mobile with the help of his friend Bruno, the trashman, who carried Oscar around in his can. Bruno was a full-body costume which allows Oscar's puppeteer to manipulate Oscar while remaining hidden by the Bruno costume.
While appearing to be the size of a normal trash can, Oscar's residence is presumably larger inside than the exterior would suggest, as evidenced by the fact that Oscar has noted through the years that it boasts such amenities as a swimming pool, bowling alley and a piano.