YUM! Today only, April 24th, Sonic Drive In has medium slushes for only $0.79 each all day long! You can even use their SONIC App and order ahead to skip the line. Offer includes Medium Single Flavor Slushes and Strawberry Real Fruit Slush. Excludes Candy Slushes, Frozen Lemonades and Limeades. You can find your location here.