Back in 83, Radio Shack sold Burger King AM radio headphones.

As you can see this radio was really a promotional item for the Whopper, and features Burger King's "Aren't You Hungry?" slogan from the early-to-mid 1980s. The back of the packaging features a detailed breakdown of the Whopper, as well as a nice black and white illustration of the standard BK franchise design that lasted through the decade at least.

What isn't immediately visible from this is just how awesome the headphones looked outside the packaging. They were in fact Whopper halves featuring the classic Burger King bun logo.

Image credit: Lazy Game Reviews (YouTube channel)