Clamato juice is perfect for mixed drinks and a great vegetable juice, contains high quality, savory tomato cocktail juice with spices. Clamato juice"s refreshing flavor when they realized how it made their long, hard days in the sun much more tolerable. Soon, Clamato became more and better known throughout the United States and México. Clamato is also the main ingredient in Canada"s number one cocktail, the bloody caesar. Walter chell invented this drink in 1969 for the opening of a restaurant called marcos.