"Smuggling" is an ugly word, so let's just say the flask is the gentlemanly way of transporting alcohol into situations where it might not be otherwise available. Made from stainless steel and curved to hug your hip or thigh, the flask has remained largely unchanged since Prohibition, and continues to be all things to all drinkers. It's equally at home on tailgates and bleachers, at boring weddings and bonfires; you can slip it inside a cowboy boot, a suit pocket, or even a sturdy garter.

If you've yet to enter the world of flask drinking, here are a few things to remember that will help you get the most out of what could be a long, beautiful relationship with the world's coolest drinking vessel.