There is a moment in the 1993 movie Demolition Man when Sylvester Stallone’s John Spartan—newly experiencing the future following a period of cryogenic incarceration—listens to an oldies radio station composed entirely of commercial jingles. To the viewer it seems a patently ridiculous idea that the lowly jingle has been somehow misinterpreted as a form of entertainment. But in listening to this week’s installment of the relatively new show Between The Liner Notes, host Matthew Billy takes a deep dive into commercial jingles and points out several times in their history when the songs themselves were as beloved as any other pieces of contemporaneous pop music. The episode provides a thorough and thoroughly engaging history of the jingle’s development, from the etymology of the word—featuring Helen Zaltzman of The Allusionist— to its current function as an impressively bad promotional song for the bathroom odor control spray, Poo-Pourri. The history of these micro compositions affords great insight into the dual life cycles of advertising campaigns and their delivery mechanisms, especially in the case study of Coke vs. Pepsi and their attitudes toward rock ’n’ roll music. In all, it makes for an enjoyable exploration of a fading relic from mid-century advertising.