When we tried to figure out what we stuffed in our backpack for a trip out in the fields we noticed that we needed about one-quarter of the bag for small stuff. Sometimes a drone, sometimes two flashguns and a remote, sometimes chargers, cables, and filters. So we made ourselves a pouch about the size of one-quarter of the packs content. Then we gave it a few loops zo we could use it as a small shoulder bag.
Now we use them for everything we want to stow away: tools, cables, chargers, a coffee-kit, drone, filters, camouflage net. Available in several colors to match your favorite or just to keep them apart.
We make them from Cordura, basic YKK 8 zipper and a nice rounded design to it is easy to tuck it away.