My friend has to take meds twice a day and was disappointed with the commercial products available for organization/portability, in both size and function - who wants to carry a week or two worth of meds around with them every day? Or deal with a giant, ugly tray? So I made them their own size-optimized containers to fit their dose. My first version was friction-fit and didn't go very well - pills all over the floor, suitcase, you name it. So I experimented with threads (they need to be WAY too small for the size of the container/lid) and eventually landed on snap-fit. This project contains 3 primary elements , all designed in Blender 3.4. A container, lid, and pocket.
The container measures 20mm high and 16mm in diameter. The lid is 4mm in height and 17mm in diameter - it adds another .5mm in height and 1mm in diameter to the assembled part 20.5 x 17). I used white PLA for day and black for night. The pocket holds 28 containers - enough for 2 weeks of twice a day meds. The pocket array is 5mm high. Go berserk and modify the sizes, colors, and geometry of everything to suit your needs.
A note on Blender and designing 3d parts. It's not great. But it's not really made to do this, as far as I can tell. Vertex's get added in weird unpredictable places, the dimensions wind up not being accurate for vertex to vertex measurements, tons of open faces get made somehow. This presumably all due to the function of the screw and boolean modifiers. It's weird and unsettling - I stressed over this for a long time before just relaxing into it and making parts with sometimes none, but often a TON of design errors. Turns out PrusaSlicer fixes most all of them. Keep that in mind when looking at the dimensions of each of the Blender pics below.
General printing notes: The level of “smallness” of these prints are approaching the limits of accuracy/precision of the mini+. When printing the containers/caps, always use the Output Options → Sequential printing selection. Otherwise it seems to produce less accurate interference profiles and stringing. I've been fooling with making a different pocket/tray design just because of this - the placement of the tray recesses are too close to print sequentially and the resultant fit suffers. If the caps fit too tightly, file the diameter of the caps a bit.
Here are some design pictures/notes for the container:



For the lid:



For a single pocket:



For multiple pockets:



An interference diagram for experimenting with tightness of snap fit:

The author marked this model as their own original creation.