I made many last year for Christmas. Everyone at first was what is this? A few weeks later everyone called me wanting more. You don't need to buy a pattern.
Belmer posted a great tutorial on this board how to make them.
http://www.quiltingboard.com/tutoria...s-t144848.html
Oh, I sold them last fall at a craft sale for $15 for two. I sold 15 sets. I used all quilt shop fabric cotton, cotton thread, and cotton batting with no scrim. I used a decorative stitch around each edge of the bowl. The bowls are not for cooking, only for heating a bowl of food. They make great lid potholders too.