stackable small parts tray (vase mode)

These are adorable little small parts trays. Some of them have adorable little dividers. They all stack on top of one another in any arrangement you want. They are designed to print in vase mode (that's "spiral outer contours" for you Cura folks). And did I mention they are adorable?

There are 4 variations included:
* an open tray with no dividers ([parts_tray_vase_1.stl](https://cdn.thingiverse.com/assets/8f/ca/b1/da/9c/parts_tray_vase_1.stl))
* a tray divided into two compartments ([parts_tray_vase_2.stl](https://cdn.thingiverse.com/assets/c9/45/b2/c1/79/parts_tray_vase_2.stl))
* a tray divided into three compartments ([parts_tray_vase_3.stl](https://cdn.thingiverse.com/assets/45/36/7a/d9/2a/parts_tray_vase_3.stl))
* a tray divided into six compartments ([parts_tray_vase_6.stl](https://cdn.thingiverse.com/assets/a6/e8/e3/12/d3/parts_tray_vase_6.stl))

That's right! Vase mode with dividers! And they are all designed to print with a standard 0.4mm nozzle (but you can also go a