Supplier Spotlights: Lula Convenience, Mars Wrigley, Relationshop & SwiftlyOther companies announcing initiatives and partnerships are AiFi, C-StoreMaster, Hunt Brothers Pizza, Kellogg Co. and Old Trapper. PHOTO GALLERY: A C-store for Unique Dietary LifestylesNorthwestern University’s new Plum Market caters to its increasingly diverse population. Six C-Store Chains Earn Spots on Top 100 Foodservice Revenue List C-stores rank as high as No. 57 on the annual magazine compilation.