The front of this lunchbox shows Han Solo, Chewbacca, Princess Leia, and C-3PO in the cockpit of the Millennium Falcon; the reverse shows Luke Skywalker, R2-D2, and Yoda on the planet Dagobah. The side images are bordered in blue and there are additional painted scenes along the band.
The thermos is blue with a picture of Yoda and the film logo. It has a white lid.
Note that there were two metal lunch kits devoted to The Empire Strikes Back, both released by King-Seeley, in 1980 and 1981. The second one has photographic art instead of painted, and a red thermos.
The illustrations for this lunchbox were done by artist Don Henry.