Southbound on 285 approaching Bailey, threw large paper bag which appeared to be full out of passenger window with another item. Then around Jefferson, threw large white and blue item out of car. Then approaching Fairplay, threw can out of car. Continued southbound on 285.
Male driver was behind me in a silver Toyota, possible a newer Tacoma, with Colorado plates. It was difficult to see license plate, but believe I have the right plate or very close.