This gentleman's essential is a timeless gift with historical origins. Flasks were first developed in the late 1800s, but owe their popularity to the Women's Christian Temperance Union (WCTU) and the Anti-Saloon League. Both of which, you guessed it, weren't particularly fond of anything involving alcohol. After successfully lobbying by both parties for Prohibition, and the passing of the Volstead Act, the flask's popularity skyrocketed as a mechanism of rebellion during Prohibition. Men and women alike used its clandestine profile to conceal their affection for a little nip every now and then. Necessity. The mother of invention.
The best man at your wedding, college football fans, professional poker players, and countless others have since adopted it as a way to transport drinks when the situation requires legal, but more conspicuous means.
Raise a toast to those who kept this classic alive and please treat this legacy responsibly.