Classic Wineskin There are 2 products.

Made of authentic, first-class goatskin, free of stains and cuts, tanned by a traditional, vegetable process.
Triple-seamed. Totally hermetic, bakelite top nozzle with clasp. Shoulder strap.

Inner waterproofing with specially-treated, natural pitch: specially recommended for wine and liquors up to 30º alcohol.

Inner waterproofing with treated, double-thickness latex: recommended for any type of drink: waters, liquors, soft drinks, fizzy drinks...

Bota bags are how wine was meant to be carried. Unlike wine bottles they aren't bulky and don't shatter.