Stacking Item Dispenser

I made this with a specific use in mind (Vaccines, vials, medicine), but it could be generalized to all sorts of things. 
The images shows a complete pair. I did some different colors to clearly show the parts.

It is a set of two dispensing towers, which can each hold 2 separate items. They are made to stack, using a dovetail piece to limit mobility. By default, it's made to only stack two, but you could stack more if you wanted. 
Included in the print is some label plaques that you can customize to whatever you use it for.

NOTE: Some assembly required.
The dovetail and any label plaques will need to be glued onto the towers. I use acrylic plastic cement, but gorilla glue should do fine too. 
There are some faint marks on the dovetail piece and its tower that demonstrate where to glue them, but it's fairly self-explanatory.

* Materials: PLA, (PETG likely fine too)
* Wall loops: 2
* Infill 10% gyroid (could likely do less)
* Support: Tree slim, 30 degree threshold. Recc top and bottom z distance of 0.3mm and 3 top interface layers to make removal clean and easy