At the last quilt retreat I was at, several of us made Ayumi's lunch bag .
Ayumi, blogs at The Pink Penguin. She is a favorite of mine. So creative! She has other awesome tutorials that you should check out. Monica from the Happy Zombie made some and did a fun post about it. Check her's out here.
They also make great small knitting bags.
This is my latest one! Love the sheep fabric. (My friend had made this with some red sheep fabric.)
I'm thinking about making some with cute feature fabric, as lunch bags for the girl that I work with.
Hope this inspires you to give this tutorial a try.