One box of Ener-C Sport drink mix, 12 packets: Ener-C Sport is a lightly flavoured drink mix for rehydration and muscle recovery. Packaged in convenient single serving packets, Sport provides healthy and effective hydration on-the-go. Throw some in your full-sized water bottle and get the benefits of natural, caffeine free energy before, during and after your workout, and whenever you are feeling dehydrated.