This product was created in part for the new generation of soft drinks in America, as the cola companies phase out the term "diet" on all sodas, because of the taboo it evokes in preference for the term "zero" or "free"
"No, its Coke Zero you ass."
Head Two: "Na man, that was a proper knock mate! Did some, felt a bit of a twitch at the beginning, then nothing after that!"
Head One: "Mate, you got done! Looks like you got hit with some Coke Zero there geez!"