Large coins are not available in my city, and when they are, they cost too much. I'm planning to make them in the shops that make medals and stuff. What do you guys think of it? Probably, I'll put the same face on both sides. That's cheaper. I'm also planning to make street copper cups. I have an idea of the size. But a little help will be great.

Are you saying you are having made a 3" coin for the final load for the cups and balls? Unless you have really large cups, a 3" coin is too big for most cups, aren't they? Just asking to clarify your post.

Do you have access to a spinning shop to make your cups? You'll need a tooling block to form the cups, which generally isn't cheap. If you're making street cups, be sure to use at least 065 copper.