answer like do assignment.its about meterials science.
you honestly cant do without foili would suggest a bottle, but nope you dont got foiltry using an aluminum canits easy.
if you dont want to use the bowl, and only want the shapeyou would need paper, water, and a reference bowl just dip the paper in water and go on sticking layers and layers of it on the circular surfacelet it dry in sun and then add another cote of paperdry againonce dried, remove the circular object from the heap of paper and colour the bowl shapeit will look like a bowlrest depends on how creative you can get.
