The news story Emma sees states that Lily and her boyfriend robbed a Tom Thumb store. Tom Thumb is a chain of convenience stores located in various cities in Minnesota, and Tom Thumb is also a fairy tale character from English folklore about a man that was no bigger than his father's thumb.
Cub Foods is an actual grocery store in Minnesota. There is not one in Hopkins, MN like Emma states in the show. There is one in neighboring St. Louis Park.