How's about-Newspaper Mache',It can form just about any shape of Bowl,Box,Cup,Hat,Tube,Eating utensils,ConeDarts,etc. the only other ingredient required would be a Liquid Starch,of which Potatoes,Cat-tail tubers or Most other tubers,Corn stalks,Banana peels,etc. could easily provide in a pinch,If the real store bought stuff wasn't available that is.