This is my own invention. I thought it would be nice to make lunch at work a bit more refined than using a ripped piece of paper towel to carry food from the microwave to the desk. I figured I'd make a pouch that can hold utensils and a napkin, and be thick enough for holding hot food. I didn't have enough for mine, but this set for a friend has matching fabric napkins.
Just slide in utensils and a napkin, fold it and toss it in the lunch bag. It adds just a little bit of niceness to lunch at your desk.