As a sommelier and brewer, I can confidently say that the longevity of beer can vary depending on whether it is stored in cans or bottles. While both can keep beer fresh, there are certain factors that may affect the shelf life of beer in each container.
Cans are generally considered to be better at preserving beer freshness compared to bottles. This is primarily because cans provide a complete barrier to light and oxygen, which are two elements that can negatively impact the taste and quality of beer. Light, especially ultraviolet (UV) light, can cause chemical reactions in beer that result in off-flavors and a “skunky” taste. Oxygen, on the other hand, can lead to oxidation and the breakdown of flavors in the beer.
Furthermore, cans are more airtight than bottles, reducing the chances of oxygen seeping into the beer. This airtight seal helps to maintain carbonation levels and prevent the beer from going flat. Additionally, cans are less prone to breakage, which can expose the beer to oxygen and bacteria.
On the other hand, bottles, especially those made of dark-colored glass, can also provide a good level of protection against light. Dark bottles, such as amber or brown ones, are more effective at blocking out UV light compared to clear or green bottles. Therefore, beers stored in dark bottles have a better chance of maintaining their flavors and integrity for a longer period.
It's worth noting that even with proper storage, beer will gradually lose its freshness over time. The flavors and aromas may diminish, and the beer may become less carbonated. However, this does not necessarily mean that the beer has gone bad or is undrinkable. It simply means that the beer may not be at its peak flavor profile anymore.
To maximize the freshness and longevity of beer, it is important to store it in a cool, dark place, away from direct sunlight and extreme temperature fluctuations. The ideal temperature for beer storage is around 45-55 degrees Fahrenheit (7-13 degrees Celsius). Additionally, keeping the beer upright can help minimize the contact between the liquid and the cap, reducing the chances of oxidation.
In my personal experience, I have found that beer stored in cans tends to retain its freshness and carbonation for a longer period compared to bottles. I have opened cans of beer that were over a year old and still enjoyed their flavors, albeit slightly muted. On the other hand, I have noticed that some bottled beers, particularly those stored for an extended period, may exhibit signs of oxidation or a loss of carbonation.
While both cans and bottles can preserve beer freshness, cans generally have an edge in terms of protecting against light and oxygen. However, the use of dark-colored bottles can also provide good protection against light damage. Regardless of the container, proper storage conditions and consuming the beer within the recommended timeframe stated on the label are crucial for enjoying the best quality beer.