marketing - First movie that collaborated with fast-food outlets?

In 1984, the movie Gremlins teamed up with Hardees to sell a set of LPs that came along with the movie:

Each week a different record would be sold, thus, each week, parents had to take their children to Hardees to get the latest one.

What was the first movie to team up with fast-food to do something like this? What was the product they sold?

Answer

The KFFT List Guide says:

Burger King was a pioneer in the
advertising practice known as the
product tie-in with a successful
partnering with George Lucas’
Lucasfilm, Ltd. to promote the 1977
film Star Wars in which BK sold a set of glasses featuring the main characters
from the film. This promotion was one
of the first in the fast food industry and
set the pattern that continues to the
present.

And from Wikipedia http://en.wikipedia.org/wiki/Burger_King_advertising :

Burger King's first successful cross- promotional campaign was in 1977. It offered several collectible items, such as
posters, glasses and sticker sets that
featured scenes and characters from Star Wars.

Here's some photos of the 1978 posters and cups and cups from 1977.