Print this using PLA filament and it will be plenty strong enough to use (even if not printed solid). The knife-edge will print very precise and smooth, giving a good profile. After making several of these I discovered that I could hold them in-hand to finish a mug I had already slip cast in a jigger mold (a jigger arm was not even needed). The profile contour was easy to copy from my drawing of the mug itself. This template is fairly narrow, this was needed so the backside cleared the rim of the spinning mold as the jigger arm is lowered. But now that I use it in-hand, I could increase that dimension so it finishes right across the base.
2019 Jiggering-Casting Project