The Barbie and Midge lunchbox was released by American Thermos in 1964. Aladdin had been offered the Barbie license, but stupidly (as with Roy Rogers) they declined. American Thermos would produce several Barbie lunchkits.
The metal version of the Barbie and Midge kit, shown here, was primarily available in Canada. The same design was used in the United States, but only on a vinyl kit.