Cains Mayonnaise, Ayer
John E. Cain began his cheese distribution company in Fanueil Hall in 1914. He solved the problem of mayonnaise always separating and introduced his company Cains All Natural Mayonnaise in 1924. Over the years, the company moved to Ayer, acquired other food companies and now produces all types of food products. But the name Cain has remained synonomous with mayonnaise.