Stelvin Caps

Recently Bing/Copilot and I had an interesting chat.

Noel: Several years ago I heard that French wine scientists had developed a screw on cap for wine bottles that had some or all of the characteristics of cork.  Do you know anything about this?

Copilot: Yes, you’re right! The development of screw caps for wine bottles has indeed been a significant innovation in the wine industry. The screw cap, often referred to as the Stelvin cap, was actually invented by a French company called Le Bouchage Mécanique in the 1950s.

These screw caps are designed to offer many of the benefits of traditional corks while eliminating some of their drawbacks. For instance, they prevent cork taint, a common issue with natural corks caused by the compound TCA (trichloroanisole). Additionally, screw caps provide a consistent seal and are easier to open and reseal.

One of the key features of these modern screw caps is their ability to control the amount of oxygen that enters the bottle, similar to natural corks. This is crucial for the aging process of wine, as a controlled amount of oxygen can help develop the wine’s flavors over time.

It’s fascinating how technology and tradition can come together to improve the wine experience! 

Noel: Do vineyards who use caps use the Stelvin caps?

Copilot: Yes, many vineyards that use screw caps opt for the Stelvin cap. The Stelvin cap is one of the most popular types of screw caps used in the wine industry. It was developed in the late 1960s and early 1970s and has become widely adopted due to its ability to prevent cork taint and oxidation.

Countries like Australia and New Zealand have embraced screw caps extensively, with over 90% of their wines using this closure. Even in the U.S., several major wineries, such as Kendall-Jackson and Bonny Doon Vineyards, have adopted Stelvin caps for some of their wines.

Noel: Why would a vineyard not use Stelvin caps?

Copilot: There are several reasons why a vineyard might choose not to use Stelvin caps (screw caps) for their wine bottles:

Tradition and Perception: Many consumers associate natural cork with higher quality and tradition. Some vineyards prefer to maintain this perception, especially for premium wines.

Aging Potential: While Stelvin caps provide a tight seal and prevent oxidation, there is ongoing debate about how well they allow wine to age compared to natural cork. Some winemakers believe that cork’s slight permeability is beneficial for the aging process.

Market Preferences: In certain markets, consumers may have a strong preference for cork over screw caps. This can influence a vineyard’s decision to stick with cork to meet consumer expectations.

Aesthetic and Experience: The ritual of opening a bottle with a corkscrew is part of the wine-drinking experience for many people. The sound and feel of pulling a cork can add to the enjoyment.

Environmental Concerns: Although screw caps are recyclable, natural cork is biodegradable and renewable. Some vineyards prioritize sustainability and choose cork for its environmental benefits.

Noel: Where does Costco fit in the list of wine sellers in the world?

Copilot: Costco is actually the largest wine retailer in the United States. Thanks to its membership-driven business model, Costco can offer wines at very competitive prices, often with a markup of no more than 15%1. This allows them to sell a wide range of wines from various regions, including California, Washington, France, Italy, and more.

Globally, Costco is also one of the top wine sellers, leveraging its bulk purchasing power to keep prices low and attract a large customer base. Their Kirkland Signature brand, which includes popular wines like DOCG Prosecco and Ti Point Sauvignon Blanc, is particularly well-regarded.