You can still Add 20 points to your My Coke Rewards account with the following codes:
These codes are valid thru 8/12 and can be entered daily as far as I can tell! These codes reset daily at 7:00 pm CT. Try them again. If you haven’t already done so try entering the code worldrecord for an additional 10 points. (limit 1)
Plus, under rewards catalog you can score free 20 oz coke product coupons for just 40 points and more!