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I Drink Your Milkshake
One of the most famous and repeated lines in the film is when Daniel Plainview screams at Eli Sunday, “I drink your milkshake!” before murdering him. This comment was inspired by New Mexico Republican Senator Albert Fall’s formal testimony, in which he used the milkshake metaphor to describe how he would take payment for oil-drilling rights. This piqued Anderson’s interest, so he incorporated it into the script. According to Anderson, the fake oil utilized in the film contains the same substance used in McDonald’s chocolate milkshakes, hence milkshakes play a part in the film.