mussuck
an inflated skin-bag for water, variously said to be made from goats, from cows or from dogs, often by bheesties.
historical
We had what was to us an extraordinary and fascinating experience in this trip of going down the Ravi River through strong rapids on mussucks, or inflated cowskins, and it was indeed a delightful river voyage of fifty miles through splendid hill scenery.
Where it comes from
From Urdu مشک (maśak) / Hindi मशक (maśak), from Persian مشک (mašk), from Middle Persian [script needed] (mšk' /mašk/), from Old Persian 𐎶𐏁𐎣𐎠 (m-š-k-a /maškā/), via Aramaic or another descendant of Proto-Semitic *mašk- (“skin”).
Adapted from the Wiktionary entry mussuck (CC BY-SA 4.0).