[Number 6]

From Winklopedia-

Boston Cooler
A Boston Cooler is an Ice cream soda typically composed of Vernors and vanilla ice cream, although in other parts of the country, different combinations of ingredients are also known as a Boston Cooler. The name remains a mystery. [14][15] It appears to have no connection to Boston, Massachusetts, where the drink is unknown. One popular theory is that it named after Detroit's Boston Boulevard, the main thoroughfare of the Boston-Edison Historic District, said to be, in such accounts, a fashionable neighborhood at the time located a short distance from James Vernor's drugstore.[16][17] Boston Boulevard, however, did not exist at the time. The streets and subdivision that became the Boston-Edison neighborhood, approximately five miles from Vernors' drugstore, were not platted nor incorporated into the city until 1891, and its first homes not constructed until 1905, nine years after Vernor closed his drugstore. [18]