Amazon has the 30-Servings Cellucor C4 Sport Pre-Workout Powder (Watermelon, 7.1oz) on sale for $22. Add two to cart for $44 - 25% 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) - $10 off multibuy discount = $26 with free shipping. Roughly 44 cents per serving.

• Includes 135mg Caffeine + Creatine Monohydrate