Wine containers and how to close them
Edouard Bourgeois
April 7, 2023
We always talk about “what is in the bottle” but I think it is just as important to discuss the bottle itself (around 30 billion wine bottles are used each year) and how it is closed. Wine producers around the world work extremely hard all year long, dealing with the natural challenges posed by Mother Nature and hoping to produce the most sound and authentic wine. Once this complex process is achieved, it is time to bottle the wine, store it and ship it, sometimes to the other end of the globe. The question of finding the right container then becomes crucial.
If today the familiar glass bottle is the most used container, wine was first stored in animal leather gourd types. It is easy to realize how these containers were far from ideal because of their lack of hermeticity and a tendency to alter the flavors of the wine. A small revolution happened when terra cotta started to develop in the 3rd century. Still in use today and revived with the growing trend of the Georgian qveris, these amphorae presented a new problem - their size was often quite large, making them difficult to transport so consumption remained local. However, these clay vessels were an excellent way to avoid oxidation (if kept closed) and combined with the use of corks developed by the Romans, they played a very important role in showing that wine may age gracefully overtime. Of course, as mentioned above, once open, oxidation became inevitable and the wine had to be consumed quickly.
Georgian workers transport a qveri
Earlier during the 1st century, wood entered the scene as another alternative for wine containers. Apparently first used to store milk in the Alps, the Gauls borrowed that type of container for wine and it quickly became the preferred vessel in Europe. It offered many advantages compared to the amphorae. Lighter, cheaper, easier to stack and easier to transport, the barrel was born and produced in various sizes and shapes (although always rounded). But just like the amphorae, the problem of oxidation remained. Once wine is racked from a barrel, the rest quickly gets exposed to oxygen, resulting in vinegar.
A modern, state-of-the-art barrel cellar in Bordeaux
We had to wait for the Egyptians to come up with the idea of glass, at first created using silica. The development of better ovens and a more acute understanding of glass making took a long time. but fast forward to the 16th century and the glass bottle started to be mass produced, mostly used to store wine. In the 17th century, England took another step towards more sturdy bottles with the use of coal powered ovens (instead of the more scarce wood) while Portugal established itself as the leader in cork production with its strong supply from oak forests. Today, Portugal is still the main producer of natural corks in the world, by far.
The bottle has gone a long way and today is much more than just a recipient. Its shape and size are directly connected with local traditions. The unique vin jaune can only be bottled in a clavelin, this curious, bulky 62 cl bottle proudly encrusted at the neck. Bordeaux adopted its signature angular shoulder bottle to easily retain solidified tannins while Alsace or Germany favor the long “flutes” bottles for their crisp whites. The weight of the bottle then almost became a status. You can still find heavy and thick bottles of US Cabernet or even Bordeaux or Burgundy, that some producers may use to justify what they consider to be a higher quality of wine. However, It seems that these heavy bottles tend to become less and less used as their carbon footprint poses an environmental problem. This idea was reinforced with wine critic Jancis Robinson who started to indicate the bottle weight along with her wine scores.
The timeless “clavelin”, solely used for vin jaune in the Jura. Its content of 62 cl instead of the most common 75 cl reflects the loss of wine during winemaking.
As mentioned above, the cork is the most common choice of closure for wine bottles. Corks come in different sizes and shapes as well, the crème de la crème being the “fleur de liège”: the highest quality, harvested from the heart of the tree bark where it is the most dense, with fewer asperities. Usually these corks are also cut long at a 5 centimeter length and, understandably so, used for the more expensive wines. Each one of these “luxury” corks can cost up to a dollar. Alternatives that are using treated natural cork can also be found with the company DIAM as a leader in that field. These corks, treated against the most common flaw that results in “corked wine”, the molecule 2, 4, 6 -trichloro-anisole (TCA) are adopted by more and more producers. They include some of the finest winemakers such as Dominique Lafon who made the bold move to switch his entire closure program to Diam with the vintage 2013, bottling his prized Volnay and Meursault and even Montrachet Grand Cru under Diam corks.
A DIAM cork in the background versus the untreated cork from Relentless in the foreground
More could be said about bag in boxes, screwcaps, synthetic corks and even wine on tap.
I personally believe that it is important to identify what matters the most when choosing the container and closure options so the quality of the wine is not altered, while favoring less expensive options and environmental friendly alternatives.
