Product Catalog
Train Set
0-4-0 Tank
2-6-0 Mogul
4-8-2 Mountain
F9 Diesel
F40PH Diesel
Alco 430 Diesel
SD35 Diesel
GG1 Electric
50ft. Double-Plug Box Car
40ft. Tank Car
50ft. Reefer Car
40ft. Stock Car
40ft. Hopper Car
50ft. Flat Car
60ft. Box Car
60ft. 3-Dome Tank Car
60ft. Reefer Car
Crane Car with Boom Tender
Operating Coal Dump Car
Log Dump Car
Hopper Car Loading/Unloading
Crossing Gate
Revolving Beacon
Coal/Gravel Conveyor
Gantry Crane
Semaphore Signal
Railroad Crossing Signal
Sure-Lock Track
Bridge and Trestle Set

Flat Car
Santa Fe with Container
No. 3406-001
Though not billed in the item description, examples of this car have a silver 40ft. container with green Burlington Northern markings.  Shown first above is the Santa Fe 50ft. Flat Car with container removed.  The container is located on the flat with two pins that hold it in place.

Pemco Trains Resource

Flat Car
Union Pacific with Container
No. 3406-011

Flat Car
Union Pacific with Bridge Load

Flat Car
Santa Fe with Bridge Load                            
No. 3453-001

Flat Car
Santa Fe with Piggyback
No. 3455-001
The Santa Fe 50ft. flat's decoration is the same regardless of the load its carrying.  This example features two separately cast pieces that the pig rests upon while on the flat car.  The pig is actually Pemco's container riding on a trailer frame, as seen in the pictures above.
Below is the origin mark found on the Pemco container underframe.

Pemco Trains Resource