In a move to improve the quality of their frozen desserts, Sonic has replaced their existing soft serve (and soft serve based desserts) with a creamier, richer version dubbed "Real Ice Cream" (to call a frozen dairy food "ice cream," it has to have at least 10% milk fat).
In addition to the introduction of Real Ice Cream, Sonic has also improved many of its dessert toppings by, among other things, reducing or removing high fructose corn syrup with more natural ingredients.
To promote Real Ice Cream, Sonic is running a "buy one, get one free anytime" offer on their shakes until June 27th, 2010. Basically, you can buy any shake and get one free shake right there and then, or get a coupon for a free shake to use later.
Sonic will also be promoting 99-cent one-topping sundaes after 8pm from Memorial Day until Labor Day (i.e. most of summer).
Details on the shake promotion: "Buy One, Get One Free Anytime offer ends June 27th, 2010. Buy one shake at regular price (plus tax) and get one free shake of equal or lesser value now or receive a coupon for a free shake on a future visit. Coupon expires July 15, 2010. Includes Cream Pie shakes and malts where available."