"Milk Coke" has been online, and apparently a lot of people like it. It's just a drink where you mix milk and Coca-Cola. Some people say to use more coke than milk, some say the other way around, and some say it's 50-50. You can also add ice. It's like a poor man's root beer float, or an "egg cream" at an old school diner. On "Laverne & Shirley", Laverne's favorite drink was milk and Pepsi . . . because it was Penny Marshall's favorite drink in real life.
If you want the recipe for how to actually make it hit up Delish.