Half Price Shakes at Sonic on Mondays

Sonic is offering Half Price Shakes on Mondays! This offer is valid for a limited time at participating locations. Each Classic Shake and Master Shake is half price. Excludes Red Velvet Cake Batter Shake. Tax and add-ins cost extra. Discount will automatically apply in the app, online, and at the drive-in. Not valid with Combos, delivery or any other offers.