Many of the signs leading the caveman to the duck are parodies of 1930s-era ad slogans: "With Cavemen, It's Duckies 2 to 1" is a parody of a Lucky Strike cigarette slogan, "With Tobacco Men, It's Luckies 2 to 1." The Caveman is a parody of comedian Jack Benny who advertised Lucky strike cigarette on his show The Jack Benny program.
The sign 'For the Pause That Refreshes... Duck' is a knock-off of an early Coca-Cola slogan: 'The Pause That Refreshes'.
This short fell into the public domain after the original copyright holder neglected to renew the copyright after 28 years.
'Duck - The Breakfast of Champions' is a play on the Wheaties line (Wheaties - The Breakfast of Champions).