Metal cast challenge coin and mold

This is a 45 mm diameter 5mm thick challenge coin and mold to make a reusable silicone mold that can be used to cast the coins in metal. I call this part the MoldMold. I've made 15 coins out of the first mold so far and the mold has held up 100% so far.

#### Background
I've been interested in Challenge Coins since [this episode](https://99percentinvisible.org/episode/coin-check/) of podcast *99% Invisible*. Last year I had my own minted through an online service. I think the material is z