or cone 18 or many other delineators known in the art the handle is formed of plastic typically during the blow molding of the cylinder or cone the cylinder 16 or cone 18 comprises a hollow body with a central vertical axis 20 and is preferably formed by blow molding and subsequent trimming such delineators are known in the art the delineator 12 may be made of many shapes and colors including those most common in the traffic delineation industry a plastic or rubber base 22 is often mounted on the delineator to provide ballast preferably the delineator is interchangeable and where applicable stackable with existing cylinders or cones and may be used with existing delineator bases making the delineator hollow reduces the weight and significantly reduces the amount of material needed the delineator may be made of any of the materials known in the art and usually includes pigments for the desired color ultraviolet light inhibitors stabilizers and fillers as depicted in fig1 and 2 the handle 10 comprises of a convexly curved lower portion 26 a concavely curved intermediate portion 28 and an upper portion 30 that includes a t shaped grip 32 the shape of the lower portion is preferably that of the outer surface of a toroid that is a cross sectional view of the lower portion has the shape of a generally circular arc having a radius of between about one half inch and one inch in the three dimensional lower portion that arc is rotated 360 u00b0 about the axis 20 of the cylinder 16 to form.