Monster Energy, Zero Ultra, Sugar-Free Energy Drink, 12-Pack - 16 Fl Oz

About this article FULL FLAVOR, sugar-free: Zero Ultra has 10 calories and zero sugar, but with all the flavor you're used to and full of our sugar-free Monster Energy blend, making it an ideal energ... About this article FULL FLAVOR, sugar-free: Zero Ultra has 10 calories and zero sugar, but with all the flavor you're used to and full of our sugar-free Monster Energy blend, making it an ideal energy drink. REFRESHING TASTE: Zero Ultra's lighter flavor profile makes it a less sweet, frothy, and citrusy energy drink that delivers a refreshing boost. Monster Energy Zero Ultra is a great energy drink for any occasion. Products may vary from those shown