Amazon offers the MusclePharm Combat Protein Powder 4-lb. Tub in Cookies n' Cream or Vanilla for $29.99. Check out via Subscribe & Save for a final price of $28.49. With free shipping, that's the lowest price we could find by $3. Each serving provides 25 grams of protein.
Note: Be sure to cancel Subscribe & Save after your item ships to avoid being billed for future shipments.