Here's an example of how to draw a contour for the chalice lathe that results in a hollow model - see the screenshot. This is a good way to control the exact shape of the interior of your cup. It should also be useful if your software isn't conducive to printing a solid model without any top layers.
If you design a chalice this way, print it with whatever infill and top layers you deem appropriate! I hope this example is helpful.
Based on my Customizable Chalice Lathe: http://www.thingiverse.com/thing:270289
Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=270289
| chalice-lathe_20140315-13659-m7xl0u-0.stl | 3.8MB |
