 Coke Zero Sugar tastes so good, people will take a taste any way they can. You never know when your best friend will lunge across a table and grab for it. A stranger could subtly swipe it, or your little brother might just ask for one too many sips. So no matter what you're doing or who you're with when you're enjoying a Coke Zero Sugar, be ready to protect it from takers at all times. Because one sip begs the question.