Ummm...
Hate to embarrass myself, but here its:
"Drink," "Soft-Drink," "Fizzy drink," or "Coke," or a major type of beverage (Ginger beer, Pepsi, Lemonade {Sprite/Solo/Mello-Yellow etc}). This is based on my experience as a Supermarket Checkout Operator (Common slang, Checkout Chick. I can "Check-out Chicks" if I have time, or run away screaming lol).