Abstract: This invention relates to a traffic cone and in particular to one which includes a conical body having a top, a flexible bag having an upper mouth, an annular member mounted on the mouth of the flexible bag and having an outer wall and an inner wall between which there is a recessed wall portion adapted to engage the top of the conical body, whereby the flexible bag may be expanded in the conical body to receive water, sand, earth, rock, or the like, so as to enable the conical body to stand firmly on the ground when in use and the traffic cone may be piled up on another one when not in use.