I know someone who attaches an unwrapped power bar to his aerobars so he can nibble on it while he's riding. I think he uses a rubber band. (It might be only partially unwrapped, I don't remember.)
Lol ew... or awesome.
Maybe the OP should get one of those harmonica holders and stuff a powerbar there instead of a harmonica.
Or one of those Rambo style bandoliers, but with powerbars instead of bullets.
OP, was wondering why you didn't get a jersey with pockets?