In the 1959 scene where Ruth, Marty & baby Jane celebrate Ruth's job, they toast a glass of champagne and little Jane drinks a toast from a sippy cup. The "sippy cup" was manufactured by Playtex in 1981.
When Professor Brown and Jim Bozarth tour the DOD computer room, it cannot be a computer room of the 70's. In those days computer rooms were on raised floors with removable sections to accommodate air conditioning the equipment. The floor in that scene is simply vinyl on sub-floor without removable sections or elevation.