You're staring down a sunset somewhere out of cell range halfway along the Appalachian trail, jonesing for drink. Who hasn't been there? Way back when, Papa Hemingway made haste with the Spanish wineskin, or bota, as he stumbled through Europe. And the next door neighbor who taught you to play Ultimate Frisbee converted their Camel Back into a portable reservoir of the headiest craft beer they might get their hands on. But what if you prefer a pull of small batch bourbon to wash down the mountain air? Or a few drags of Sailor Jerry while sailing the Keys? Traditional flasks simply aren't enough, carrying an embarrassingly insufficient four to six ounces of your favorite booze.