There is a website called: http://recessedcuttingboards.com
They have heat resistant cutting boards that are inserted directly into a countertop. They are almost completely flush with the counter. I have had one in my house for about a year and a half. I love it. You can set a pot of boiling water on it and it won't damage it. I have droped heavy bowls on it and it doesn't even crack. I love it. It is non-porous and cleans really easy. It is just like wiping down the counter. They are made of tempered glass. It doesn't sag, and it only took my husband about 15 minutes to install it. I love it and recommend it to everyone.