No, nothing to do with Speedos or your wife's purse....
As a new pinball owner, I find the clumsiest part of working my machine is popping the balls out and putting them in a safe place. Typically they would go in my pocket, precariously on any flat surface within arms reach, or just haphazardly inside the cabinet. Separately, I have been trying to find a better storage solution for my new and used pinballs that seem to multiply in the coin box where I had had been keeping them. Thankfully I managed to solve both problems with a 3D printed ball container.
For capturing balls out of the machine, it's a simple matter of dropping the container in the launch channel, tilting the PF and kicking the solenoid. They all roll gently into place.
For storage purposes, I have printed multiple containers with different colored lids to indicate new/used/polished or whatever.
While trying to come up with my own design, I found a configurable container on Thingiverse and fiddled with the dimensions. I am happy to send the stl files with anybody who wants them, just shoot me a PM. This is probably the most boring mod ever posted, but I have found them fantastically useful and wanted to share.
-Rob