Along the lines of Chris's post on waste=food, I thought I'd post this lunchbox, a concept from the design team of Dunne & Raby.
This is a piece from a series called "Is this your future" (2004) ? (If all goes well, perhaps the answer to the question is in one sense, yes?)
Of course, in one sense, it is really also our past and present. People have been (and still do) use "nightsoil" to fertilize for crops. These days some like to call it "Humanure...."