I have the latest Lionel Merch. car. It uses a can motor now so the discharge of boxes is much smoother than the postwar version. It doesn't throw them very far. If anything, it could probably stand to fling them a bit further. However, the rate of delivery is still pretty quick and toylike.
I also have one of the MTH units that Barry mentioned. It too is very smooth in operation. The rate of delivery is much slower. It's a scale sized and detailed car and comes with a plastic ramp that sits trackside to accept the packages. The refrig "smoke" effect is via a seuthe type smoke unit.
Both are good cars. One aimed at the postwar fan and the other at the scale crowd.