Strange Bowl: 16 cylindrical shells

The area between y=x and y=x^2 is rotated about the line y=1.25. This creates a volume of revolution which looks a bit like a bowl, but with a conical interior and a big hole in the bottom. This volume is approximated by 16 cylindrical shells. Note that the 16th shell does not appear on the model since it has zero volume.

This model pairs with Strange Bowl: smooth & 16 washers (http://www.thingiverse.com/thing:922306 and http://www.thingiverse.com/thing:897934).

This model was designed an