The Vitamin Shoppe[vitaminshoppe.com] has the 12-Pack 16-Oz C4 Energy Drink (Strawberry Watermelon Ice) on sale for $8.24. Note discount appears in cart. Free store pickup, not available for shipping. YMMV deal.
This deal price is $24.73 lower (75% savings) than the list price of $32.97.
Store availability may vary (YMMV, though my local store has this in stock).