These are printed in PLA without support, they are able to snap into each other allowing for creating your own shapes

Available in two sizes, they still have the same outer diameters to still be able to used in combination with each other:

• Standard size: normal size for most of the caps that I have encountered so far
• Large size: slightly larger for some of the more robust caps

I also added a hanging attachment which can be used to nail the entire system to the wall. I ended up going with double sided tape which worked wonders.