"Within all those pictures, I came across these two little blue boxes, " she recalled.

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Before they ever sold a desktop, they made money building "blue boxes" illegal devices that hacked into free phone lines.

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But where Sugarfina really stands out is in design each candy is packaged individually in transparent cubes, neatly packed into bento box-inspired Tiffany blue gift boxes.

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Companies like Tiffany, which has a trademark on the distinctive blue color of its boxes, also took a keen interest in the proceedings.

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The boxes, red or blue or otherwise, are rapidly taking over the DVD business.

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The chain, which had scotched its signature blue A-frame design in favor of big boxes that can seat more customers, is testing a new prototype that uses the A-frame as a restaurant's entranceway.

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Visitors on the cruise ships that dock here are greeted by scarlet-red pillar-boxes, and even a roof bearing the red, white and blue union flag.

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Special light boxes, or flat lamps that simulate natural white light with a blue tint, are also effective, noted Foster, who has been consulting with Delta on the feasibility of introducing such lights into airport lounges.

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