Deep Flight Aviator's wings, viewed in cross section, look exactly like an airplane's, upside-down: They're curved on the bottom, flat on top.

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The anodized aluminum chassis curves around to cradle the LCD on the left and right, but it's flat on the top and bottom, with edges exhibiting the subtle chamfering that appears to be all the rage these days.

ENGADGET: iPod nano review (2012)

Cristal is one of the oddest looking bottles on the market with its clear bottle, flat bottom and cellophane wrapping.

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Fortunately, this means we finally get to say goodbye to the pebble look and feel: the edges are straighter from top to bottom, giving our fingers more surface to grasp onto, and the back cover fits flat on the faux-chrome edge instead of curving around it like waves of the ocean.

ENGADGET: Samsung Galaxy S 4 review Mobile