I posted on another thread about a place called Sepulot in Sabah, North Borneo and it reminded me about Avtur.
All our fuel was parachuted in by Beverley and there was no way of returning the empty drums so the were rolled, or marshalled by helicopter, into the river. They would float downstream and the local Muruts would pull them out to use for a multitude of uses. Foundations for longhouses, water storage, you name it. There would be about two gallons of fuel left at the bottom and they would use this for cooking or something.
We, the Air Force left and handed the operation over to the Navy. The situation changed. The locals now had to collect the empty drums and apparently they had to pay for the remaining fuel. There were arrangements, so I was told, that a full drum would be available if required. M$25 being the suggested price.
I don't know how true it was but my airmen were being charged at a 100% mark up for their cans of Tiger.