Why is heinz ketchup sold to restaurants with 'not for retail sale'?

Heinz ketchup sold to restaurants with a 'not for retail sale' label is typically packaged in larger containers designed for commercial use, rather than individual retail bottles. This designation helps to prevent restaurants from reselling the product directly to consumers, ensuring that the product remains exclusive to food service outlets. It also allows Heinz to maintain pricing structures and brand integrity within the retail market. Additionally, it distinguishes the product's intended use and distribution channels.