Why Do We Still Use Glass and Aluminum for Alcohol Beverages Instead of Plastic?
Alcohol beverages have traditionally been stored in glass or aluminum cans, but not in plastic bottles. This practice is rooted in the quality, safety, and taste that such packaging provides. While plastic may be suitable for short-term storage and has certain advantages in specific contexts, it is not the ideal choice for the majority of alcohol beverages. In this article, we will explore the reasons behind this choice, backed by both historical practices and scientific studies.
Historical and Practical Considerations
Back in the days when plastic packaging was less common, alcohol was almost exclusively stored in glass bottles or aluminum cans. These materials have distinct advantages that make them ideal for preserving the quality and taste of alcohol over time. For instance, certain types of drinks, such as wine and spirits, are still primarily stored in glass because of its ability to maintain the integrity of the product.
Wine Storage in Plastic Pouches
Wine boxes, which use plastic pouches to hold the contents, are a notable exception where plastic is used for short-term storage. The pouches are designed to maintain the quality of the wine during transport and short-term storage. However, once the wine is opened, it is generally consumed more quickly to prevent it from losing its quality.
Alcohol in Plastic Bottles
There are indeed some instances where alcohol is stored in plastic bottles, such as cough syrups or non-alcoholic beverages. However, spirits and other alcoholic beverages are rarely encased in plastic due to the risks involved. Plastic is more permeable than glass, allowing oxygen and carbon dioxide to pass through more easily. This can cause the alcohol to degrade and lose its quality, particularly in carbonated drinks like soda.
Market Evidence and Examples
Despite its limitations, there are instances where plastic is used for storing alcohol. Some cider and wine in the South West of England are stored in plastic containers. Additionally, at concerts and sports venues, plastic bottles of beer and wine are commonly sold. However, it is not the general norm.
Recent Instances of Plastic Use
The author mentions personal experiences of purchasing 1.75L plastic bottles of rum and Canadian whisky. These instances suggest that plastic usage is not as common as one might expect in the alcohol industry. Furthermore, the evidence of plastic use in less premium alcoholic beverages, such as 'hobo wines' or 'cooler' type drinks, further highlights the niche nature of plastic use in the alcoholic beverage market.
Scientific Insight: Permeability and Shelf Life
One of the primary reasons why glass and aluminum are preferred over plastic for storing alcohol is due to their inherent impermeability. Glass is virtually impermeable to oxygen and carbon dioxide, meaning that the alcohol stored in it can retain its quality for a longer period. In contrast, plastic is more porous and allows these gases to pass through more easily, leading to a faster deterioration of the beverage's taste and quality.
Chemical Reactions and Flavor Integrity
In addition to permeability, another factor is the potential for chemical reactions between the stored alcohol and the plastic container. Glass, being chemically neutral, does not react with the contents, preserving the natural flavors and aromas of the alcohol. This is why glass is often referred to as the “neutral” choice for storing alcohol.
Research and Books
For a deeper understanding of the properties and uses of glass, the author has written a book titled "Through The Glass." This book explores the science behind glass and its numerous applications, including its role in the preservation of alcohol. If you are interested in learning more, you can find the book on Amazon using the link provided.
Retailers and Consumers: Understanding the importance of packaging materials can help consumers make informed choices and encourage retailers to prioritize quality over convenience. As technology advances, it is possible that new packaging materials may emerge, but for now, glass and aluminum remain the gold standards in the alcohol industry.