The Skytop Lounges were a fleet of streamlined passenger cars with the parlor-lounge cars built by the Chicago, Milwaukee, St. Paul and Pacific Railroad ("the Milwaukee Road") and sleeper-lounges built by Pullman-Standard in 1948. The cars were designed by famed industrial designer Brooks Stevens. The fleet included both parlor-lounges and sleeping cars. The lounges entered service in 1948 on the Twin Cities Hiawatha, while the sleeping cars were used on the long-distance Olympian Hiawatha. In 1964 the Milwaukee Road sold the sleeping cars to the Canadian National Railway, which operated them until 1977. The parlor cars continued in service with the Milwaukee Road until 1970, when they were retired.