While I love my coffee machine, no in-built storage for the tamper and the double-shot basket irritated me. So I made this model :-)
The top provides a convenient resting place for your tamper between coffees, and underneath a perfect storage location for the filter basket you aren't currently using.
I've provided a 54mm and 58mm version, which suits the Breville Bambino and Breville double boiler respectively - they probably also fit many others. I suggest opening the STL's in your slicer to check the measurements.
If your tamper/basket does not fit, there is a fully parametric FreeCAD model included so you can make your own!
The author marked this model as their own original creation.