Decided to design this because I saw the pill container contest.  Turns out that I finished it after the contest was over, but I still like the design.  This needs to be printed on its side, but I think that it could be modified to make it a longer box, or to have more slots, etcetera.  The example image was printed at 0.3mm layer height and 10 percent infill.  I'm certain that adjustments to those settings would yield a longer lasting container, but the way it is seems fairly sturdy.