haven't fully worked out how it's done. the foreshortening of the label when it's near the edge of the can is got somehow by many paragraphs getting narrower and narrower towards the edge of the can. maybe the foreshortening is got by simply using the thin slithers of the image in such a way to miss out parts of the image near the edges thus achieving the foreshortening effect. don't quite get it but i think it's something like that.
these are the two main images:
that first label image is the only label image.