Amazon has the 12-Pack 16oz Cellucor C4 Performance Zero Sugar-Free Energy Drink (Official Variety Pack) for $18 - 40% off coupon (check "Save an extra" box, eligible on first S&S order for this product) - 5% off with Subscribe & Save (can cancel at any time) = $9.89 with free shipping on $35+ or with Prime. 82 cents per can. 200mg of caffeine.

• Flavors include Skittles, Orange Slice, Strawberry Watermelon, and Frozen Bombsicle.