I bought  this second hand Werckmann Stackable Toolbox, but it was missing a lot of storage cups on the top, so I designed them in Tinkercad in order to make the toolbox complete again.

There were some other Werckmann storage cups online, but for other models which were not of this size.

Version 2 has some little improvements on the holder on the bottom (slightly higher) and some improvements on the edges on the top.