Colour Bottle Storage System Extension

Having added to my collection of colours in the last few months (one of the reasons is my Christmas present, an airbrush), my storage system did not provide enough space any more. This afternoon I added a fourth box.

I am using the boxes paper packages are delivered in, cut down to 8cm height. Inside, I created a system of compartments, where I put the bottles upside down (to be able to see the colour).

Here are my colours (except those I am currently using in projects):