Growlers Worthy of Your Brew.First of all what is a growler? Simply put a growler, is a jug or bottle or bucket to carry your freshly poured beer from the brewery to your home, or your friends house, or to the beach for a barbecue. Basically it’s a way to carry beer. So you can show your friend this new brew you tried at the brewery. You can just have it poured in your growler at the brewery or brew pub and take it over to his or her house for a tasting right there and then. So what makes a good growler, It has to be able to do the job of carrying beer.