Choose Your Favorite Limited Master Shake from SONIC for a chance to win 30 days of free Shakes!
SONIC doesn't think you need to choose between cake and a shake, so they've introduced three new LIMITED TIME ONLY Master Shakes to their lineup: Vanilla Birthday Cake, OREO & Cake, and Strawberry Shortcake. They want to know which people are most excited about, so it's time to vote.What's in it for you? Just by voting, you coud be receiving a free shake coupon right in your inbox! Winners will be chosen all day, every day through November 15, 2015.