Thumb Score: +18

Amazon [amazon.com] has 6-Pack 16.9-Oz Coca-Cola Soda Bottles 4 for $21.56 – $15 (multibuy discount) – 5% when you check out via Subscribe & Save = $13.92.
Shipping is free with Prime or on $35+ orders.

Target [target.com] has for Target Circle Members (free to join [target.com]): 6-Pack 16.9-Oz Coca-Cola Soda Bottles for 4 for $21.56 – $6.56 (Multibuy discount when you buy 4) = 4 for $15. Select free store pickup where available.