Holiday Pecan Pie Flavor Funnel joins SONIC's Blast® Flavor Funnels   OKLAHOMA CITY, 2016-Nov-02 — /EPR Retail News/ — SONIC® Drive-In (NASDAQ: SONC) is expanding its line of innovative SONIC Blast® Flavor Funnels with the Holiday Pecan Pie Flavor Funnel. Boasting a rich chocolate funnel all the way down the middle of the new Pecan Pie Master…