White colored spirit / cocktail for milkman costume

heyo so i’m being a milkman for halloween and part of my costume is this little milk crate that holds two bottles, i wanna empty two milk bottles and fill them with some sort of alcohol that looks exactly like milk. ideally if someone knows some sort of premade white colored cocktail that i could buy that would be great cuz i don’t have any shakers or anything. someone told me white russian but i looked it up and it doesn’t look completely white. any help would be appreciated thanks