The Gods Must Be Crazy (1980)

A Kalahari bushman discovers a Coke bottle, thrown from a passing plane, in the middle of the desert, which he believes is a gift from the gods. The gift proves to be more of a curse than a blessing when the tribesmen begin to fight over it and eventually use it as a weapon. To keep peace in the village, the tribesman decides to take the bottle to the end of the earth and throw it back to the gods.