Guess what? In addition to the 1976 "United We Stand" 7 Up set, there is a set called "America's Turning 7 Up," which was 7 Up's advertising campaign in 1978-79.
My "America's Turning 7 Up" cans
Each can is individually numbered (1-50) and has a short paragraph about that can's state. I have only acquired four of the fifty cans in the set so far, and those came from some can lots I bought on eBay before I was even aware the set existed.
I got this picture from the internet. Notice when you stack the cans in order, the white on the cans makes the outline of the 48 contiguous states.