Remember those briefcases that had little combination locks on them? (Are those still around?) You would dial in your combination on a set of reels and then slide a mechanism that would spring a latch, opening the valise.
I need one to carry around all my electronic gadgets and their respective chargers. A combination might be useful but I already have more passwords and PINs than I can remember. I just need a button for Open and one for Shut.
I'll call it my Open and Shut Case and market it to lawyers.