i threw a large bowl. 2 kgs of clay and it just worked. nice inside profile, and then i turned only a little to get the outside profile. the plate is a full size dinner plate for scale
i've also made up some chinese takeaway containers from paper clay. i rolled the clay out thin, then draped it over a brick and folded the shape into it. taking it off the brick was a mole. the bowl is same as above but in different lighting.