I don't know if you like Dooney or not (I know that some people can't stand it), but they make a cute lunch bag. It is the "it" pattern on clear plastic.
http://store.dooney.com/OA_HTML/ibeCCtpSctDspRte.jsp?section=20731
http://store.dooney.com/OA_HTML/ibeCCtpSctDspRte.jsp?section=20731