In a Facebook post, the Winn-Dixie, BI-LO and Harveys banners of Jacksonville, Fla.-based Southeastern Grocers announced a contest whereby consumers may vote for their favorite new flavor of store brand Chek soda (Tropical Island, Key Lime Pie or Funnel Cake) to help determine which one stays in stores. The "Chek Flavor Contest," open to adult residents of Alabama, Florida, Georgia, Louisiana, Mississippi, North Carolina, South Carolina and Tennessee, ends on Sept. 30.