If your family just loves Sonic just like mine does then you will love this deal. On June 24, 2015 all day they are offering there Medium Famous Slushes for only 79 cents. That's right .79 cents. any flavor! There is a limit of 4 per customer there is a cost for add-ins. Tax is not included in this price. But make sure your mention the offer when you are placing the order. Have a slushy day!