My Coke Rewards seem to have a new promo where you can earn 3 free bottles of Coke (or presumably any similar Coke product) in the form of 90 My Coke Rewards points -

details here.

More information:

You can now pay for your Coke with your smartphone (but your first 3 are free).

1. Link your MCR card to your Isis Mobile Wallet and instantly receive 90 MCR points - enough for 3 free drinks. The Isis Mobile Wallet is available on select AT&T, Verizon and T-Mobile devices.
2. Redeem your points with your smartphone at a participating MCR machine. 1 drink redeemable for 30 points.
3. Plus, you'll get 3 MCR points every time you buy a drink at a My Coke Rewards machine with your Isis-enabled phone. See MCR Card Rules for details.

Small print:

Awarded as 90 MCR points. 3 free drinks redeemable at the 30-point value only at My Coke Rewards machines.
30 point offer available until December 31, 2013 and void where prohibited. Must have available incentive credit or eligible payment card loaded in Isis Mobile Wallet in order to tap to pay.