Existing storages are attractive but not really practical : either you opt for a box (too bad, aroma you want is under all other) either you opt for a rack that takes a lot of space (and I do not want to exhibit my capsules).
The two fit together well, the transparent one is just a bit too high.
I’m going to play with my Dremel
I remove 1 cm high on the box that will be the drawer.
A cutout on the narrow side of the box that will be the base.
I add a wedge because the drawer is shorter than the base.
Alternative: an iron set on cotton, seam disabled and inserting wax paper. Iron until your wax paper becomes transparent, that is when the plastic is melted below. I admit it is a bit tedious.
Arranged alternately in order to store more capsules.
I sticked my specifications!