You know, a leather paisley-shaped bag for storing your favorite liquid consumables. Smells like leather a bit though. I wonder, how would this device not spunk up the flavor of whatever’s in it? Or is that part of the charm?
Most “modern” botas have a vinyl liner (or some similarly flexible plastic) so they’re waterproof and the beverage doesn’t pick up anything from the outer shell.
The cheap leather one I had, had a thin latex liner.
If you look down into the neck you should see it (and feel it).
CMC +fnord!
If you get the outside wet it helps cool whatever is inside it, evaporative cooling!