And so we have come to appreciate the concept of 'the growler'.
from The New York Daily News:
HOW TO TAKE CARE OF YOUR GROWLER
Once you are the proud owner of your own jug of beer, American Beer's Jay Steinhauer - who hopes to add even more taps for growlers at American in the fall - offers a few tips on taking care of it.
1. KEEP IT FRESH: Freshly poured beer won't stay fresh for long, says Steinhauer, so “keep it in the fridge,” he says. Unopened, it'll last for a week or two at most, but “once you open it pour it off in a couple of days,” he says, if not that night.
2. TREAT IT GENTLY: “Don't let it jostle around,” recommends Steinhauer of growlers, as that will kill the carbonation in the beer, especially if it has already been opened.
3. CHECK YOUR SUDS: If your growler has been sitting for a few days, says Steinhauer, gently rotate it, as the first beer poured is a little thinner and less flavorful. Or do as Steinhauer does, and serve yourself last.
4. TIDY UP: Most places don't clean the growlers before they refill them for you, so be sure to clean them yourself with lots of hot water. But don’t use soap, says Steinhauer, as it is hard to rinse away and the residue will interfere with the flavor of your beer.