That's so funny -- I actually have that same green pouch you've got. I found it randomly in a Daiso while visiting some friends in California. Handy little bugger.

I've been looking for something similar, because while I have a Peak Design Tech Pouch, it's honestly too bulky and "formed" for what I need on the daily, which is a catch-all for a pair of small external SSDs, USB-C hub, earbuds and a small collection of random cables, thumb drives and other bits & bobs.

I ultimately settled on this pencil pouch. It's durable enough with a small amount of organization, but packs flat in a pinch. While I wasn't sure about it when viewing online, it was a easy "I'll give it a try" for $7 US. Turns out to be perfect -- I can even sneak a few pencils and even my Zoom H1n.