How Long Does Carbonation Last in Soda?

Carbonation typically lasts between 6 and 9 months in sealed soda containers when stored properly. Still, this duration can vary significantly based on several key factors. 

In this guide, you’ll learn what affects carbonation longevity, after which we’ll go over some tips for maximizing it.

WestAir supplies gases for beverage carbonation across California and Arizona.

The Science Behind Carbonation Retention

To keep soda fizzy, you need to understand how carbonation happens in the first place. Specifically, carbon dioxide (CO2) – the gas that gives soda its signature bubbles – is dissolved into the liquid under pressure.

Temperature plays a crucial role in this process. Cold temperatures help keep the CO2 dissolved in the liquid, while warmer temperatures cause the gas to escape more quickly. That’s why a cold soda stays fizzy longer than one left out at room temperature.

The pressure inside the container also matters, which is why opening a soda releases that familiar “hiss” sound – it’s the pressurized CO2 starting to escape.

Storage Conditions and Their Impact

The way you store your soda directly impacts how long it stays carbonated. The ideal storage conditions include:

• Maintaining temperatures below 72°F (22°C), preferably around 45°F (7°C)
• Keeping containers away from direct sunlight
• Storing bottles and cans upright to minimize the surface area exposed to air
• Ensuring containers remain tightly sealed

Proper storage significantly extends carbonation, while poor storage conditions can lead to flat soda in just a few days.

Container Types and Their Effect on Carbonation

Not all beverage containers are created equal, so you need to choose the right one to maintain carbonation. For example, glass bottles tend to retain carbonation better than plastic containers thanks to their non-porous nature and typically narrower necks.

Aluminum cans are also excellent at preserving carbonation due to their complete seal and pressure resistance. Standard plastic bottles might seem more convenient, but they’re slightly porous and may allow small amounts of CO2 to escape over time.

Still, specially designed plastic bottles can extend shelf life in commercial settings. For example, a standard 20-ounce plastic bottle typically maintains optimal carbonation for 8 to 11 weeks, but specialized manufacturing processes can add up to four more weeks of freshness.

Real-World Applications and Best Practices

When handling carbonated beverages, proper inventory management and quality control are essential to lasting freshness and fizz. Here are some practical steps to maintain carbonation:

• Implement proper rotation systems to ensure older stock is used first
• Monitor storage temperatures consistently
• Train staff on proper handling and storage procedures
• Consider investing in specialized storage solutions for temperature control

Keep the Fizz Going

While carbonation can theoretically last indefinitely in a perfectly sealed container, commercial packaging isn’t designed for eternal storage. The key is understanding these principles and implementing proper storage practices to maintain beverage quality for as long as possible.

Your chosen CO2 solutions also make a world of difference, so get them from a reputable supplier. The right vendor can provide options designed to help maintain optimal carbonation levels in commercial beverage systems, ensuring your customers enjoy the perfect fizz in every drink.

Nick Vasco

Nick is an experienced B2B writer who brings his skill for crafting clear, easily digestible content to the industrial gas space.