German manufacturer Rephorm produces this line of nifty balcony-based products. Designed by Berlin-based Michael Hilgers, they're meant to bring some liveability to your balcony—here in New York, well, we've got fire escapes—by using the railing itself as the support.

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The balKonzept is a desk with a plant-holding trough up top, which could alternatively be filled with "ice cubes and some champagne," in the company's romantic copy.

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Balconismo is a railing-hanging flowerbox, with enough room in its fat lip to hold a reservoir of water.

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Eckling takes the same concept and adds a 90-degree mounting channel, enabling users to pretty up the corners.

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Now comes the curse of the industrial designer, where we have to wonder how these are made. All three are listed as being made from polyethylene. As you can see on the edges of the unit in the photo below, it's no secret where the mold comes apart:

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Given the materials choice—from what I remember, PE was the go-to stuff for this process—do you reckon it's rotation-molded?