As a sommelier and brewer, I can tell you that the freshness of a growler or crowler from a brewery is best maintained within a certain time frame. While it is possible for the beer to stay fresh for longer, it is recommended to consume it within 7-10 days after it has been sealed.
The reason for this recommendation is that growlers and crowlers are typically filled individually by hand at the brewery. While every effort is made to ensure that they are properly sealed, it may not be as consistent as the sealing process of a state-of-the-art canning or bottling line. This means that the beer may be more susceptible to oxygen exposure, which can lead to a decrease in freshness over time.
When a growler or crowler is filled, it is a moment of excitement and anticipation. The beer is fresh and ready to be enjoyed. However, as time goes by, the flavors and aromas of the beer can start to deteriorate. This is especially true if the growler or crowler is not stored properly, such as being exposed to heat or sunlight.
I have personally experienced situations where I have opened a growler or crowler after a couple of weeks, only to find that the beer has lost some of its vibrancy. The flavors may become muted and the aromas less pronounced. It is a disappointment when this happens, as I know that the beer could have been enjoyed at its best if consumed within the recommended time frame.
To ensure the best possible experience with your growler or crowler, it is important to store it properly. Keep it refrigerated to slow down the aging process and minimize any potential off-flavors. Avoid exposing it to direct sunlight or extreme temperature fluctuations. Treat it with care, just like you would a bottle of wine or a delicate ingredient in a recipe.
While it is possible for a growler or crowler from a brewery to stay fresh for longer than 7-10 days, it is recommended to consume it within this time frame to ensure the best possible flavor and aroma. Proper storage and handling are key to maintaining the quality of the beer. So, go ahead and enjoy your growler or crowler while it's at its freshest!