Here I present a history of portable storage, culminating in the pinnacle of organization, portability, and convenience.
(Homage to GPowers, who gave us a good laugh with the guide rail history and who I am humbly imitating).

Pre-Plastic man:
Doomed to weak cardboard, floppy containment, and sometimes questionable labeling..  Don't light a match or spill your beverage!  What the heck kinds of screws are those anyway?




Pre-Container man:
Used primitive "cup-like" devices to hold hardware.  Poor organization.  Poor portability (spills!), and questionable convenience... easy to access, hard to find what you want.  I can grab 'em fast, but who knows what I'll get!




Pre-Systainer man:
Popular throughout the so-called "Twentieth Century".  Excellent, though overcomplicated organization.  Superb portability, if you want to take the whole thing.  Convenient... until you forget which tray the #8 1/2" screws are in!  If you just want one size and not the whole tray... TOO BAD!





Modern Systainer man

Ultimately effective and flexible organization.  
Exchange and substitute the container size you need, all within the Systainer footprint.  




Just look at this interior awesomeness!  MTV should feature this space on 'Cribs'.
Extremely awesome firm lid pad keeps fasteners from moving from one box to another.  No cohabitation allowed!




Outstanding portability.
Integrated ergonomically styled Systainer-man sized handle.  Docks with all Festool Systainers, Sortainers, CT dust collectors, and even travels well solo (note: will probably *not* pass through airport security unnoticed, when stocked with fasteners!).  When latched closed, any amount of jostling, juggling, pole vaulting, resting in the car, or deep sea diving will not force fasteners to leave their assigned homes and confuse the user in a subsequent high-pressure assembly situation.
Good, quiet tenant happy to be housed below any Festool drill.




Peak convenience.
Travel with a wide assortment of screws, as your needs develop and evolve and change.  User-designed labeling (change it at any time!) allows for easy and instant identification of the desired fastener.  Go ahead, break up with straight slot screws and Mr. Phillips, and embrace the Robertson revolution (this is aimed at US users!)




Removable containers allow even more compact portability for a specific job.  Assembling outdoor furniture?  Just take the 2" SS screws.  Drawer slides?  How about the miniature #8 1/2"  pile o' pan heads?  What the heck are the #6's for?!




The Systainer Sys-1 Box: All business bland on the outside.  All rainbows and order on the inside.   Can be configured with up to 32 of the smallest Orange boxes; also available with lime green inside (see below note).  

Bring your threads into the 21st century and announce to the world that you are no longer content with low-brow cardboard, and that cups and bowls are for eating!  Carry your Sys-1 Box and know that you the person to screw anything to anything, no matter the job.




(Please, note, I have removed the largest green box and a yellow in my configuration (in line with its flexibility), and substituted in an additional blue, and two additional orange.  The "stock" photo is below, for information / reference purposes, as copied from the festoolusa.com site.  Also note that the stock photo is incorrect, as the green box is a blinding bright lime green, and the blank spots in the lower middle actually includes three yellow boxes.  Empty space not permitted!).