Final answer:
While Elvis Presley was a cultural icon and music legend, the provided reference does not mention any specific live TV commercial endorsements. Presley's career was mostly centered on music and movies, not on product endorsements on live television.
Step-by-step explanation:
The only product Elvis Presley ever did a live TV commercial for is not addressed directly in the provided reference information, which focuses on his music career and impact. Presley, known for his unique blend of musical styles and his association with Memphis' Sun Records, was a cultural icon, but the reference information does not mention any specific product endorsement.
Historically, Elvis Presley is not known for his participation in live TV commercials, as his brand endorsements were limited, and he was mostly focused on his music and acting career. To provide an accurate answer, additional research outside of the provided text would be required.