How long can an unopened growler last if kept refrigerated?

An unopened growler can typically last for about two weeks when kept refrigerated. This duration is due to the way growlers are sealed, often with a twist-off metal cap or a swing top, which helps maintain freshness by limiting exposure to air. The carbonation, aroma, and flavors are preserved for this timeframe, given that the growler is stored in a stable, cold environment.

Beyond this two-week window, while the beer may still be safe to consume, the quality can start to degrade, impacting the taste and overall experience. Factors like the type of beer and how it was handled prior to filling can also influence its shelf life. Therefore, two weeks is a well-accepted guideline for how long one can expect an unopened growler to maintain its intended quality when properly refrigerated.