So in my first post I explained what a grognard was and how the slang for wargamers came about. It's been brought to my attention however that not everyone may know what a growler is.
In short, a growler is a half-gallon jug to transport fresh beer from your local brewery, brewpub, or even grocer to your home. They can be simple or extravagant (see the Stone Brewing growler far below). When you purchase your (first) growler of beer, you typically will also pay for the growler itself (in the form of a deposit). Most purveyors will credit this to you upon return or simply charge a refill price on your subsequent visits in lieu of the original price.
Below are a couple growlers from local breweries - Olde Mecklenburg Brewery (Charlotte, NC) and Cottonwood Brewery which is owned by Carolina Beer Company (Mooresville, NC).