Last week I cast these little shot glasses from some 3D prints I had made. The outside is cast in yellow bronze and the inner cup is sterling silver. I still need to finish these up, but I'm really digging these. Burnouts from ABS prints has been going great and the centrifugal casting machine I refurbished last year is a dream to use. I'm so glad I bought this. It's going to get a lot more use in the future for certain.