If you can see art in anything, then Framing Napkins from Kouichi Okamoto may be for you. Why throw away or clean your napkin when you can frame it forever?
I am not to sure how the whole Framing Napkins process works. All I know is that it involves $40 and a memory that is certain to last until the next course is served.
Check the reference links to find out more about these framed food stains. Whoever said barbecue sauce couldn't be a medium for art clearly never thought of Framing Napkins!