As a sommelier and brewer with years of experience, I can confidently say that laying wine on its side does indeed help it last longer. There are two main reasons for this: preserving the integrity of the cork and allowing for the detection of sediment formation.
Firstly, let's talk about the cork. The majority of wine bottles are sealed with cork, which is a natural and porous material. When a bottle is stored upright, the cork can dry out over time, potentially leading to air seepage into the bottle and causing oxidation. Oxidation can significantly alter the taste and aroma of the wine, resulting in a less enjoyable drinking experience.
By laying the bottle on its side, the wine remains in contact with the cork, keeping it moist and effectively sealing the bottle. This prevents air from entering the bottle and helps preserve the wine's freshness and flavor. I have personally seen the effects of improperly stored wines with dried-out corks, and it is truly disheartening to witness the disappointment of opening a bottle only to find it spoiled.
The second reason for storing wine on its side is to monitor the formation of sediment. Sediment is a natural occurrence in wine, especially in aged bottles or those that have not been filtered extensively. Sediment consists of tiny particles such as grape skins, stems, and tartrates that precipitate out of the wine over time.
When a bottle is stored upright, the sediment settles at the bottom of the bottle, making it difficult to detect without disturbing the wine. This can pose a problem when it comes time to decant or pour the wine, as the sediment can mix with the liquid and affect its clarity and taste.
However, when the bottle is laid on its side, the sediment spreads out along the length of the bottle, making it easier to see if any sediment has formed. By carefully observing the bottle, you can determine whether or not decanting is necessary, allowing you to separate the clear wine from the sediment before serving.
I have encountered numerous instances where wine was stored upright, and when it came time to pour, the sediment had mixed with the wine, resulting in a less visually appealing and potentially gritty texture. By storing the wine on its side, you can avoid this issue and ensure a more pleasurable drinking experience.
To summarize, laying wine on its side is crucial for prolonging its lifespan and maintaining its quality. By keeping the cork moist, oxidation is prevented, preserving the wine's flavor. Additionally, storing the bottle horizontally allows for easier detection of sediment formation, enhancing the overall enjoyment of the wine. So, the next time you store a bottle of wine, be sure to lay it on its side, and you'll be rewarded with a better drinking experience.