From Malcolm Gladwell’s The Tipping Point:

Part of the appeal of Jim Henson and the Muppets to the show’s creators, in fact, was that in the 1960s Henson had been running a highly successful advertising shop. Many of the most famous Muppets were created for ad campaigns: Big Bird is really a variation of a seven-foot dragon created by Henson for La Choy commercials; Cookie Monster was a pitchman for Frito-Lay; Grover was used in promotional films for IBM. (Henson’s Muppet commercials from the 50s and 60s are hysterically funny but have a dark and edgy quality that understandably was absent from his Sesame Street work.) (p. 117, paperback edition)

WHERE CAN WE SEE THESE COMMERCIALS?