The temperature outside is heating up, so that makes this deal extra cool. Today, Wednesday, July 26, SONIC Drive-In is offering 50% off shakes and ice cream slushes — all day. There is a limit of 5. The limited-time Ice Cream Slushes flavors include grape, blue coconut, orange, cherry, blue raspberry and strawberry. Remember, the chain offers the same deal after 8 p.m. every day for the summer. Enjoy!