As an expert sommelier and brewer, I have had the opportunity to use the Coravin wine preservation system and I must say, it really does work. The concept behind the Coravin is to allow you to sample a glass or two of wine without spoiling the rest of the bottle. It uses a needle to extract wine from the bottle, while replacing the space with inert gas to prevent oxidation.
One of the things I appreciate about the Coravin system is how easy it is to use once you get the hang of it. Initially, it may take a bit of practice to perfect your technique, but once you do, it becomes a breeze. The system comes with clear instructions and a helpful video tutorial to guide you through the process.
The key to using the Coravin effectively is to ensure that the needle is inserted properly into the cork, and that you maintain a steady hand while pouring the wine. It's important to note that the Coravin works best with natural corks, as synthetic or agglomerated corks may not reseal as effectively.
One of the main advantages of the Coravin system is that it uses carbon dioxide, which is cheaper than the argon gas typically used for still wines. This makes the system more cost-effective in the long run. Additionally, the Coravin allows you to preserve sparkling wines, which is a unique feature compared to other wine preservation methods.
In terms of the preservation itself, the Coravin does an excellent job of keeping the remaining wine in the bottle fresh. I have personally used the system to sample wines over the course of several weeks, and each time I went back to the bottle, the wine tasted as if it had just been opened. This is a testament to the effectiveness of the system in preventing oxidation and preserving the wine's flavors.
Of course, it's important to note that the Coravin is not a foolproof method and there can be some limitations. It may not work as well with older or fragile wines, as they may be more sensitive to exposure to oxygen. Additionally, the system requires a certain level of skill and precision to use effectively, so it may not be suitable for everyone.
Based on my personal experience as a sommelier and brewer, I can confidently say that the Coravin wine preservation system does indeed work. It is a reliable and effective tool for sampling wines without compromising the rest of the bottle. The ease of use, cost-effectiveness, and ability to preserve sparkling wines make it a valuable addition to any wine enthusiast's toolkit.