When I was growing up, and still to some extent, all
carbonated soft drinks were Cokes, never mind the brand name or the flavor. I was very surprised when my friend from Canada, who lived here for a time, offered to bring me
a soda from the drink counter. I was expecting seltzer water with vanilla ice cream in it, and she brought me a
Coke!(BTW, Coke w/ vanilla ice cream in it is a Coke float.)

My college roommate, from Pittsburgh, used to tell me to
open the light.