These are some of the simple tool holders that I made for me to stick to the sides of my P1S to hold a few things that I always use.

They are made to use minimal filament (just 2 walls thick), so might not be suitable to store very heavy things.

(Yes I keep all my purge lines to indicate successful prints)

There's 4 variants:

1. 180mm/80mm/65mm bins
2. 120mm/80mm/65mm bins
3. 80mm bins
4. 65mm bins

I use double-sided sticky foam tape to stick them to the sides of my printer