Sonic's 3-D Slushes Named the Year's Best Billboard Campaign at 2015 Obies

Kenneth Cole, Seattle Aquarium work also honored

Adams Outdoor Advertising took home the Best Billboard Campaign award for its "Big Slushes" ads for Sonic Drive-In at the Outdoor Advertising Association of America's Obie Awards on Tuesday night. The campaign turned billboards in the Charleston, S.C., area into giant slushes complete with 3-D straws.