Tequila, like many spirits, does definitely not expire in the exact same way that perishable foods do, but it could undergo changes as time passes that affect its taste and quality. While tequila can be stored for long periods without spoiling, its flavor may evolve and diminish as time passes as a result of factors such as oxidation and contact with light and heat. Generally, unopened bottles of tequila may be stored indefinitely without significant degradation in quality, as long as they're kept in a cool, dark place far from direct sunlight and temperature fluctuations.

However, once a package of tequila is opened, its shelf life can differ depending on how it's stored and the conditions it's exposed to. Exposure to oxygen may cause the flavors of tequila to alter with time, ultimately causing a lack of freshness and complexity. Additionally, if a container of tequila is stored improperly, such as for instance in a hot or humid environment, it might become vunerable to spoilage and degradation.

To prolong the shelf life of an opened bottle of tequila, it is important to store it properly by keeping it tightly sealed and far from heat, light, and oxygen. Some tequila enthusiasts also does tequila expire storing opened bottles in the refrigerator to decelerate the oxidation process and preserve the flavor. However, it's important to see that storing tequila in the refrigerator may lead it to become cloudy, but this doesn't affect its quality or safety.

In terms of taste, tequila can become smoother and more mellow with age, particularly if it's aged in oak barrels. However, prolonged exposure to oxygen also can cause the flavors of tequila to become dull and flat, leading to a loss in complexity and character. Consequently, it's generally recommended to eat opened bottles of tequila within a couple of months to a year for optimal flavor and quality.

Ultimately, while tequila doesn't expire in the standard sense, it could undergo changes as time passes that affect its taste and quality. By storing tequila properly and consuming it in just a reasonable timeframe, you can make certain that you enjoy the entire flavor and character of this beloved spirit.