Thank you for your response, and positivity. I actually designed it to fit standard size muffin pans. You are correct that I wanted it to be made and sold alone, but I realize that cannot be the case now. It must be sold as a 2 pice set (with an accompanying muffin pan). The only way to have it fit all manufacturer pans is by making it adjustable somehow, and that would take me back to the drawing board. As for the taper, I was told that it would have to be slightly tapered for mass production. I actually wanted the hole to be the same size thru-out and possibly bigger. This will allow for fillings like jams to be spooned in and for larger solid fillings like a Hersheys Kiss to be popped in. The size on top shouldn’t matter so much b/c most people frost their cupcakes and it will get covered in the end. Again, thank you so much for you response.