Coke went on to demonstrate the dozens of initiatives they have undertaken to reduce calorie intake, including front-of-package calorie labels and increasing low- and zero-calorie options, especially in schools.

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More recently it tweaked its artificially sweetened, zero-calorie Diet Pepsi to improve shelf life.

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Zero-calorie carbonated beverages and bottled water are now a bigger part of the mix, and consumers are clamoring for them.

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In a 2-minute ad spot, the company pitches its formula to fight obesity: Choose products with low or even zero-calorie content, including a broad array of low-calorie drinks from its own portfolio ( Coming Together).

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Of the 3, 500 drinks Coke sells worldwide, more than 800 are zero- or low-calorie.

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The soda companies also are working to develop zero- or low-calorie natural sweeteners that better mimic the taste of full-calorie sodas.

WSJ: Fizzy Drinks Revenue Goes From Flat to Sour