Well, the 1/2 price shakes deal is back on December 21st, and to get you psyched up, Sonic has another $20 gift card to give away. Just leave a comment with your email and let us know which shake you are thinking of trying, and then I will pick a winner at the end of the week. Now don't forget that the new limited edition Chocolate Mint Holiday shake won't be around much longer, so this is a good chance to try it.
Update: And the winner is Beatrix_Delilah_Rice for her completely terrible doomsday pun, creativity will always get you bonus points!
Disclaimer: I will receive a $20 gift card as well for mentioning the above offer