Customizable cucumber jar-based shelf system

These are building blocks for a shelf for glasses of our favorite brand of pickled cucumbers.
By attaching several of them, you can build a shelf of almost any size.
And even better: You can change the size of the module to match the size of whatever glasses are standing around in your kitchen, in case they are not from Hengstenberg.

This system has solved a very real problem:
My wife had the habit of storing just about everything in these glasses, but the growing number of them made hand