Clamato /kləˈmɑːtoʊ/ is a drink made of reconstituted tomato juice concentrate, flavored with spices and clam broth.Made by Mott's, the name is a portmanteau of "clam" and "tomato". It is also referred to colloquially as "clamato juice". Clamato was produced in its current form beginning in 1966 by the Duffy-Mott company in Hamlin, New York, by two employees who wanted to create a Manhattan clam chowder style cocktail by combining tomato juice and clam broth with spices.