SONIC® Drive-In launches SONIC Blast® Flavor Funnels   OKLAHOMA CITY, 2016-Aug-30 — /EPR Retail News/ —  SONIC® Drive-In (NASDAQ:SONC) introduces an irresistible new way to indulge your sweet tooth with SONIC Blast® Flavor Funnels. Take the Blasts you love to the next level with a funnel of creamy OREO® stuffing, peanut butter, caramel or chocolate filled right…