Leather flask pouch/sporran?

[Archangel]

I need help. I see flasks & pouches regularly for sale. I would like to know, does the flask go in the pouch & both go in the sporran? Is the flask pouch actually a small sporran? And if so, how is it worn?
Thanks
David

some old kilts have a pocket sewn on the panel underneath the apron. My army surplus one has a pocket for the paybook, I have seen others designed to hold a bottle. Think of it like a "flask dhu", the wee flask goes wherever you can hide it.