30% off 3 Select Soda Items. Amazon has the 12-Pack 12oz Coca-Cola Soda (Classic Coke, Diet Coke, Coke Zero, A&W Root Beer, or Sprite) for $8.39. Add three to cart to reach $25 - 30% off at checkout when you buy a 3-Pack - 10% off with Subscribe & Save (can cancel anytime) = $15 with free shipping on $35+ or with Prime.