The number of tools which a penknife can be expected to accommodate is now phenomenal…but any of these with even the slightest possible use as a weapon are banned from air travel.
You can even buy eg an MP3 player from Victorinox which, oddly, comes “with or without blades” (In the latter case it seems to have none of the essential pull-out functionality of its stablemates).
Today’s invention, however, is a ‘penknife’ with only an entirely innocuous collection of tools on board: eg magnifying glass, tweezers, torch, memory stick, watch …
As a disliker of puns, it pains me to admit it, but my wife just made me laugh by referring to this as Victorinocuous.