The energy drinks feature packaging that changes colors when the can is cold and ready to drink.

"Their status as one of the fastest-growing energy drinks in the country excites us ... energy and focus they need to perform at their best." C4 Energy will also appear on the Seventh Avenue ...

US energy-drink and recovery-beverage producer ... and fitness enthusiasts to achieve their best, and we are thrilled to ...

announced today a new multi-year partnership with Nutrabolt®, naming C4 Energy®, one of the fastest growing energy drink brands in the country, the Official Energy Drink of the New York Knicks.