hen PepsiCo Inc. exhibited at this American Bottlers of Carbonated Beverages show in 1940, it wasn’t just marketing its product — it was hiring, too. After the soft-drink maker introduced a 12-ounce bottle of soda that cost just a nickel during the Depression (twice the amount soda rival The Coca-Cola Co. offered for the same price), spurting sales created a need to recruit bottlers any place it could, including trade shows. Originally known as Brad’s Drink, Pepsi made even more history in 1940 with “Nickel, Nickel,” the first advertising jingle ever broadcast nationwide.