I've designed this model trying to reduce the mess on my desk.
It can store up to:
5 USB drives
3 SD cards
4 AA batteries
Some post it 50*20 mm
1 leatherman Multi tool
1 Smartphone
A bunch of keys
2 Allen keys
1 jack 3,5 mm dongle
And some other stuff
Hope this will be helpful
If you have any question or request just ask, I'll be happy to answer :)

https://youtu.be/O8o3HjylYW8