What is the name for leather wine pouch?

There isn't a single universally recognized name for a leather wine pouch. Here are some terms you could use, depending on the context:

Formal:

* Leather Wine Flask: This is a straightforward and accurate description.

* Wine Skin: This term is more specific to traditional leather pouches used for winemaking and storage, especially in regions like the Middle East and Mediterranean.

Informal:

* Wine Bag: This is a general term that can be used for any type of bag designed to carry wine.

* Leather Wine Bottle Holder: This is more descriptive if you're looking for a pouch specifically designed to carry a single wine bottle.

Other:

* Canteen: This term is more associated with water pouches, but it can also be used to describe a leather wine pouch.

* Gourd: This term is used to describe a similar container made from a gourd instead of leather.

The best term to use will depend on the specific context and the type of pouch you are referring to.