(Early 20th century)
Richard Hellmann was a deli owner in New York City in the early years of the 20th century. He made his salads and sandwiches with his wife Nina's mayonnaise. It was so popular, that he began selling it by the scoop, and then in bulk to other stores. In 1912 he built a factory for producing it in jars, and it was an immediate success. His Blue Ribbon mayonnaise in jars contributed greatly to the surge in popularity of cole slaw as a side dish.