Mulligan Coin

I had a golf scramble coming up and someone mentioned some fun additions to the game, mulligan being one of them. The question came how do we know who actually paid for a mulligan? So I made these quick little tokens to give to the paying players as proof, since in a golf scramble there is hardly any trust as it is. I wanted to make them able to snap in half, so after you use it you can make sure no one tries to use it twice, but I couldn't get it to snap well and like the solid coin reusable look.