I have one that I used back in the 1980s as a factory rep for an electronics company. It could be filled with different tools but there are limitations. I haven't found another since.
The only real benefit to it was that it gave customers confidence that I knew what I was doing in the medical field of electronics, at least that was the intent I'm sure. It originally belonged to the company. So for practicality, a canvas bag would work as well. I recent bought a couple of Xcelite's bags.
Steve