Oddly enough, one of the coolest flasks we've ever come across is one that looks dug out of our grandparents' antique chest. Like many flasks, it's made from pure stainless steel — but what sets it apart is its gorgeous relic patina, not to mention the etched snake graphic on one side. It looks like something a pirate would've carried, and it certainly makes us feel like one when we drink from it. Minus all the murder-y parts, of course.