There is a rare Coke printable coupon available here. Don't wait long to print it if you are interested!
Play the Sobe Heads or Tails game to win free Sobe or several other prizes. I have won almost every time I've played (I chose the "character" with the lowest win percentage), several buy one get one printable coupons and two free item coupons (which will come in the mail). You can use the BOGO coupons to do the Sobe deal at Target and get them free after gift card. You're allowed to play once a day and and can win more than once.