They are also distribution network companies. If I'm not mistaken, Coke & Pepsi do their own deliveries. And they are large enough that they will sign exclusiv

They are also distribution network companies. If I'm not mistaken, Coke & Pepsi do their own deliveries. And they are large enough that they will sign exclusivity deals with restaurants and venues to sell their products (often supplying the equipment). Generic store-brands have no reach to venues and restaurants outside of their stores.