"So Round, So Firm, So Fully Packed" is a 1947 song by Merle Travis, written by Travis, Eddie Kirk, and Cliffie Stone.
The slogan "So round, so firm, so fully packed, so free and easy on the draw" was used in the Lucky Strike brand cigarette advertising of the time, first heard in 1944 on the Jack Benny and Your Hit Parade radio programs.
[citation needed] "I'd walk a mile" is a slogan for Camel cigarettes.
"Just ask the man who owns one" refers to Packard automobiles.
The song was Travis' second number one on the Folk Juke Box charts, where it stayed at number one for 14 weeks and a total of 21 weeks on the chart.