The Box (1967 film)

The film is a dialogue-less cartoon with a minimalist soundtrack by jazz drummer Shelly Manne.

On a rainy night, a short, old man in a raincoat walks into a bar, placing a small black box on the counter next to him.

After getting another drink, the old man pulls out a bag of food pellets, empties it on the bar top, and opens the box.

The old man immediately takes a liking to her and shows her the box, though he asks her not to open it and instead buys her a drink.

She also takes out a bag of food pellets, which are eaten by a small creature similar to the one in the old man's box.