Growlers are large capacity beer containers that are typically made of glass, ceramic, or stainless steel. In the late 1990s, growlers began gaining in popularity at craft breweries and brewpubs as an easy way for patrons to take beer home when traditional bottling was not a reasonable option. A typical growler holds 64 or 68 fluid ounces, but they come in a variety of sizes. The top of the growler creates an airtight seal using either a screw cap or a hinge/latch style cap and can keep beer fresh for over a week if maintained properly.
Below is an example of five different styles of beer growlers: a ceramic Widmer Gasthaus growler, a Deschutes latch top glass growler, a small screw top glass growler, a Russian River latch top circular growler, and a Firestone large screw top growler.