For the past few years I've been buying my bags from a factory in Turkey which we know and get them at a good price. I used a navy blue one for a few years until it needed a small stitching repair. Now I have a wine coloured one, their style is quite similar, with an over shoulder strap and a few sections with zips, both inside and out. I find them very functional for carrying mobile, keys and mask on the outside and two sections inside for bits and pieces.
I don't change over unless one wears out, I wouldn't want to move all my stuff around.
On my last trip I got one for my DIL and she's using it.
They cost about £20 which is not cheap in Turkish lira.
The most expensive bag I bought was from M&S, it cost £50 at least twenty years ago but it was leather