Sonic Drive-In is “shaking” things up again by bringing back this very popular limited-time offer. The burger chain’s daily 1/2 price Happy Hour on drinks and slushes from 2 p.m. to 4 p.m. does not include shakes. However, if you’re willing to wait a few hours, you can enjoy a late night treat and save a few bucks. Every day after 8 p.m., all shakes are 50% off. The sweet choices include vanilla, chocolate, strawberry, caramel, pineapple, hot fudge, and fresh banana – each one topped with, of course, whipped cream and a cherry. The sizes and prices before the discount are a mini (10 oz.) for $1.99, small (14 oz.) for $2.49, medium (20 oz.) for $3.29 or large (32 oz.) for $3.99. There’s no limit, so everyone can enjoy a cool treat without breaking the bank.