Sonic has an expanded selection of shakes for the summer that includes Oreo Caramel, Peanut Butter Banana, Strawberry Cream Pie, Chocolate Covered Banana, Peanut Butter Cookie, Lemon Pie, Chocolate Covered Strawberry, and Jalapeno Chocolate.
If you miss out, they've also been offering half-priced shakes after 8 PM in a deal that slated to go all summer long.