Black wineskin There are 2 products.

Made of authentic, first-class goatskin, free of stains and cuts, tanned by a traditional, vegetable process.
Outside stitched seam with leather reinforcement.
Resistant plastic nozzle .
Leather collar with triple tie.
Leather strap.
Inner waterproofing with specially-treated, natural pitch: specially recommended for wine and liquors up to 30º alcohol.
Inner waterproofing with treated latex: recommended for any type of drink: waters, liquors, soft drinks, fizzy drinks...