I liked PeguinFeet's model but I was having trouble getting some pills out, and smaller pills were getting stuck in the lettering. So I added sloped edges for easier pill removal, moved the days of the week labels to the wall, and shuffled the divisions around.
This printed insert fits into a standard sized Altoids tin.
"As the original designer of the remixed part says, 'Smush it into an Altoids tin.'"