If anyone is looking for a simple to machine, high margin product, I recommend you Google Ice Ball Makers. A friend asked me to make him one for drinking Scotch, it wasn't too hard to make and works well. I was shocked when I saw what they sold for. Cheapest ones I found were about 400 bucks, and most were closer to double that. For the one I made, I had stock on hand, but even at retail metal prices, there isn't $100 worth of material in it.

Terry