Vegiform.

Vegiforms are clear plastic mold that you can put on a growing vegetable, like a zucchini or a melon, and make it conform to the shape of the mold!

VegiForms are available in five basic shapes: the Garden Elf, the Pickle Pusses, and Ear of Corn; and, for the gourmet gardener, the Heart and Diamond, which yield heart and diamond shaped slices when cut.

Link – via Boing Boing