Jean Auel discusses this technique often in her Earths Children series. The first is Clan of the Cave Bear. There are 4 books, that I know of, in this fiction series. I did see a comment about 6, anyone know what happened? Although they are fiction they are supposedly well researched. Those who read this forum should find them interesting. Most techniques seem to have some thought behind them, and even if one knows enough to find whatever faults there might be, you can feel smart pointing them out to the rest of us. Each volume is rather long.
The protagonists are always boiling things in hides. The main secret is to make sure there is enough liquid to keep the material from overheating and burning. I would imagine there would be some seepage. You obviously want to keep the heat source below the liquid level. With the line-the-pit method mentioned above, I think it was in one of the aforementioned books, that I read the suggestion to place a few bones (or rocks or whatever) on the inside so that when you drop in a hot stone, it does not directly contact the bottom.
The primitive people that are the subject of the books were adept at fashioning flint tools. Given that, I wonder if individuals in those circumstances, would choose a nice metal pot to cook in or a metal knife?
I dont happen to have a big spare hide handy so Ill look forward to some posts by someone who has practiced the technique. I recall in one of Rons videos, he pointed out some holes in solid rock that the Indians used, to drop in hot rocks, to boil things. In the Jungle video Karen showed some ceramic cups being made, but I do not know if they would hold up to the use being discussed by this thread.