so that any liquid within the pipeline rearwardly of rear cup 20 tends to be drawn in by gas flow this liquid collects within the interior 64 of body 10 so that the interior body forms a reservoir 66 that carries liquid with it reservoir 66 functions as a source of liquid that is available in the event the pipeline pig passes an area that it is otherwise void of liquid thus the provision of an interior reservoir within the body of the pipeline pig helps insure more consistent and even distribution of treating liquid to the upper interior portion of a pipeline interior wall fig1 taken in conjunction with the cross sectional views of fig3 through 6 shows an alternate embodiment of the invention in which the same or equivalent elements have the same numbers as in fig2 but in all respects the arrangement of fig1 is the same as fig2 except that fig1 provides in addition to the first reservoir 66 within the confines of body 10 a second reservoir 68 that is formed within the interior of a nose cone 46 a nose cone 46 a is essentially identical to nose cone 46 of fig2 except for the provision of the second reservoir area 68 further the siphon passageway 50 includes a siphon tube 70 that has an open lower end 72 that communicates with second reservoir 68 formed in the nose cone an additional element in fig1 compared to.