[7] Clamato was produced in its current form beginning in 1966[citation needed] by the Duffy-Mott company in Hamlin, New York, created by Francis Luskey,[citation needed] a chemist, and another employee working out of California[8] who wanted to create a Manhattan clam chowder style cocktail by combining tomato juice and clam broth with spices.

the Clamato label was updated and no longer shows the image of a clam, an attempt by the manufacturer to downplay the seafood aspect of the beverage.

The case reached the Supreme Court of Canada and it was ruled that FBI Foods would pay Cadbury-Schweppes $300,000 for revenue they lost in the first year of competition.

[10] Since 2018, Keurig Dr Pepper has sued several companies who have been infringing on the Clamato trademark using the "mato" suffix to describe their version of the product.

[11][12][13] Clamato is used primarily as a drink mix for alcoholic beverages (an estimated 60% of sales in the US in 2008[14]), and it is popular for this in both Canada and Mexico, but less so in the United States (outside of Canadian-American and Mexican-American communities).

[15] Since 2001, Cadbury Schweppes (now Canada Dry Motts) has been selling an alcoholic version of the beverage called the Clamato Caesar in the Canadian market.