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Half Price Shakes at Sonic on Mondays
Sonic is offering Half Price Shakes on Mondays! This offer is through December 16, 2024 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.