After finalizing the design for my aluminum stemware, I created some 3D computer models in Rhinoceros CAD and got them SLAed (3d printed). The result is what you see below.
These models are currently at a foundry, being cast in aluminum. They have a hollow, honeycomb internal structure and are very delicate so that the aluminum can easily fill the cavity. The red portions are foundry wax, which I used to beef up the areas that might have been too thin to cast well.
It's a shame that they're about to be incinerated by molten metal. The wax and translucent plastic were really beautiful.