This object is inspired by the notion of hypercube, in geometry it is an n-dimensional analogue of a square (n = 2) and a cube (n = 3). It is a closed, compact, convex figure made up of groups of opposite parallel segments aligned in each of the dimensions of the space, at right angles to one another.
Aion is therefore a cube in dimension 4 or 4-cube.
Time can be seen as a fourth dimension, placed here in the center and represented by the growth of the plant that you can plant there.
In total Aion measures 100x100x100mm and can contain 40x40x50mm of soil or water.
I suggest layers of 0.3mm, a brim wide enough to prevent your impression of peeling (15mm) and support if your printer is not capable of good bridges.