This flask won the best product design award in 2014 at the New York Now design festival and we can see why. The flask is a stainless steel pocket flask designed by The Principals. Each flask has a unique shape created through hydroforming. Two sheets of surgical-grade stainless steel are welded together and inflated with water pressure, creating a slightly unique shape each time. So not only is this flask functional, but you'll also look super cool when you whip it out.
And while you're at it, consider putting one of these flask-worthy cocktails inside.