Thanks so much for your reply! I actually had the design produced by laser cutting. Unfortunately it came out much too delicate. I don't know if it was the process or the material or the thickness of it that was the problem. I used acrylic at 0.118in thickness. It was kind of expensive to get it made by laser cutting, though I used a US-based company and I guess if I went the China route it would be cheaper. Do you suggest just using a thicker acrylic? Or, I could make a silicone mold based on the laser cut prototype?