C4 Performance Energy Cosmic Rainbow is a candy-inspired energy drink collaboration between Cellucor's C4 brand and Skittles, delivering explosive energy with a sweet, guilt-free flavor profile. Each 16 fl oz can contains zero sugar, zero carbs, and zero artificial colors, making it a popular choice for athletes and active individuals looking for a performance boost.

Each can is formulated with 200mg of caffeine for sustained energy and focus, along with CarnoSyn® Beta-Alanine, a clinically studied ingredient that fights fatigue and supports muscular endurance. The formula also includes BetaPower® for muscle cell hydration and physical performance support, plus key nutrients Niacin and Vitamin B12. The product carries the NSF Certified for Sport® designation, making it suitable for professional and collegiate athletes subject to testing.

This Costco pack includes 12 cans of 16 fl oz each, for a total of 192 fl oz. Not recommended for children, pregnant or nursing individuals. Store in a cool, dry place.