Marijuana Pepsi Sawyer (née Jackson) has "never once smoked the stuff and prefers orange soda."
Sawyer's mother, Maggie Johnson, picked her name. Her father objected but lost the argument. To this day, a lot of family members and best buds call her Pepsi.
"She said that she knew when I was born that you could take this name and go around the world with it. At the time as a child, I'm thinking yeah, right. You named my older sister Kimberly. You named my younger sister Robin," Sawyer said. [Link]