Is there anything better than ice cream, even during the winter? Sonic Drive-In is making this year’s winter solstice a little colder and sweeter with 50% off all shakes on Monday, Dec. 22. The sweet choices include vanilla, chocolate, strawberry, caramel, pineapple, hot fudge or fresh banana with each one topped with whipped cream and a cherry. It’s also a perfect opportunity to indulge your sweet tooth with one of its limited-edition holiday shakes. There’s no limit, so everyone can enjoy a cool treat without breaking the holiday bank. You could even buy a few to keep in your freezer for a treat later in the week.