Not for prepping perse, but for general use. I needed somthing smaller than the work bag. So, I bought a Tablet/iPad bag (with padding). I had to modify a few things, and I am even thinking to remove the padding to create some more space. But all in all it has been OK. It holds reading glasses, some meds, A5 notepad, and few other things.

You will do me a great favor, though, if you guide me to a MEDIUM sized messenger bag (5 to 7 liters size / 300 to 400 cubic inches) without padding and with an admin/organizer pocket. It should NOT be tactical, but definietley manly.

The iPad bag is OK so far, but it is congested as is. It has no space for emergency items like a multitool, roll of duct tape ... etc.