Sprint Chocolate Wafers

In early 1969, ad executive Ted Bates, representing Mars, Inc. (known for candy products such as M&Ms and Twix), approached Jim Henson about making a commercial promoting Sprint Chocolate Wafers, a combination cookie/candy bar. Henson’s first concept was to create a two-headed creature who had opposing views of the wafer; one head who thought it was a cookie and the other who thought it was candy. To add a visual contrast, Henson devised the left head to have a smokestack on top to punctuate his speech with a "toot", and the right with a light bulb-like protrusion on top that would light up and “ding" (much like the creatures he created for the "Business Business" sketch performed on The Ed Sullivan Show).

According to the notes on Henson’s original proposal, the creature would have been a live-hand puppet, and like other devouring Muppet monsters of the era, it would have a throat opening so it could really eat the product (As Henson wrote "Very effective puppet business").

Although it was decided to use humanoid characters for the commercial instead, Henson's two-headed creature idea served as a genesis of sorts for not only Sesame Street's Two-Headed Monster, but for the Honkers and Dingers as well.