It's rare for me to actually describe an iPod case as mouthwatering, but that's exactly what Incipio's Wafer dermaSHOT Case  is ($15). Naturally, it's not edible, but it just looks like a delicious treat.
The case, which works only with the iPod Shuffle's latest generation , is available in chocolate, strawberry, or vanilla . . . oops, I mean brown, pink, or yellow. The silicone will protect your little iPod, and your diet, possibly; I just don't think it would taste very good.