Phillips Head Screwdriver Diversion Safe
Screw it, I'm taking my stash. This Phillips Head Screwdriver Diversion Safe retains a screwdriver's trademark talent of screwing and unscrewing screws, while bringing a new trick to the party: unscrew the Phillips head screwdriver's own head, and you'll find a cylindrical compartment just big enough to hold a rolled-up bill or two. Pills and joints seem like welcome residents too.
The stash safe is one of the more inconspicuous ones I've seen. I mean, provided you're not taking it to a board room or the beach, or somewhere it would be odd to have a screwdriver on hand. In those cases try the Mr. Stash Cap and the sunscreen flask.