In my setting, wands and staves are two of the many means by which magical creatures can harness, to a limited degree, other magical creatures' powers. When a magical creature (known as an immortal) dies, a small bead-like gem is left behind, called a soul gem. This piece of crystalized MANA (magic DNA) can be harnessed in various ways by channeling another immortal's magical energies through metal and into the soul gem, altering the nature of the magical energies to be more like those of the soul gem's species, like light traveling through colored glass.
Wands and staves are generally the ways that activated, projectile-based abilities, like fire breath or conjured lightning for instance, are used. They consist of three parts:
A metal rod to conduct the magical energies through
A soul gem at the business end to give the magical energies shape
A non-metal, non-conductive casing, with a hole for the holder to let their skin touch the metal inside, intended to keep all the magical energy flowing in one specific direction like the barrel of a gun.
And speaking of guns, the main difference between them is a lot like the difference between pistols and rifles: wands, made with shorter pieces of metal that don't let as much magic travel through them before hitting the business end, offer greater concealment and portability and don't require as much magical energy to use. Staves, meanwhile, allow more magic to travel through them before hitting the business end, and thus are stronger and also more accurate while being less portable, more magically intensive, and less concealable. ...In theory.
Ironically, though, it's actually kind of the opposite on that last point when it comes to appearing normal to the oblivious humans. A staff is quite a bit more normal to walk around with in modern day, because it's quite easy to explain it away as a walking stick/cane. But wands never saw any sort of mundane use at basically any point in human history, and thus in practice they'd need to be disguised as some other device so as not to raise eyebrows in the event that someone found they were carrying one.
But what sort of object would be best for that? What roughly foot-long object, totally normal to carry around in modern-day times, could something that fits all three of the above requirements for a wand be easily disguised as?