Who: Sonic Drive-In
What: Customers get half-off all milkshakes the entire day. Along with staple flavors like vanilla, chocolate and strawberry; this offer also extends to specialities shakes like Sonic's Oreo Peanut Butter shake, Strawberry Cheesecake Shake and Coconut Cream Pie Shake. If there was any excuse to drown you holiday spirits in milkshakes, this is it.
Where: All participating Sonic Drive-Ins.
When: All day Monday, Dec. 22.
