You can pick up an assortment of carry bags at the local market here in rural Isaan for 100 thb each.
I have a couple I have purchased.
One can hold an Action camera and stick, a regular camera, cellphone and more. All for 100 thb.
They also sell an assortment of real leather belts for the same price.
If this was in a tourist area the prices would be triple.
One of the advantageous to living in rural Isaan.