Inside it is a mixture of Tanqueray and clarified fresh-squeezed grapefruit juice that is carbonated directly (to achieve fizz without any seltzer).

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The Coca-Cola Company holds as much as half of the domestic Chinese market for carbonated beverages, but the juice business is highly fragmented.

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The growth can be attributed to a change in consumer taste away from high calorie carbonated drinks and towards healthy and nutritious juice drinks.

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PepsiCo says Kickstart, which is carbonated, is also not a soda because its 5 percent juice content qualifies it to be considered a "juice drink" under guidelines set by the Food and Drug Administration.

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"Pepsi has the leading market share in the U.S. in sports drinks, ready-to-drink coffee, bottled water, juice drinks, ready-to-drink teas and the number two position in carbonated soft drinks, " notes Stack.

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