Back at the park, a frenzy of journalists are sampling tasters from rows of boutique eateries, coffee shops and a juice bar, each with colorfully decorated interiors that belie their miniature scale.

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"It's incredibly difficult to scale a kid down to the recommended 50 grams of sugar when a juice box has 24, " said Heather Vanderhaar, of suburban Cincinnati.

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Researchers have created a partnership with the juice-making industry in Brazil and have launched the Orange Peel Exploitation Company to demonstrate the technology on a large scale.

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