How Freezing Affects Pressure Inside a Soda Can
When a sealed soda can freezes, water expands and CO2 solubility drops, raising internal pressure. According to beverage packaging data, a standard 12 oz aluminum can withstands about 90 to 130 psi before failure, while typical carbonation pressures range from 30 to 40 psi at 40°F. As temperature drops below 30°F, pressure can climb toward or exceed the can's burst threshold, especially if the can is fully sealed and undisturbed. For deeper context on material limits, see aluminum can engineering standards from Forbes.
Carbon dioxide behavior in cold liquids is well documented in food science research. At 32°F, CO2 remains dissolved but exerts more force against the walls as the liquid expands. If the can is opened slowly, a sudden pressure drop can cause foaming or a burst-like release, but a true explosion from a sealed can is less common than a leak or seam failure. The U.S. Food and Drug Administration provides guidance on safe storage of carbonated beverages at FDA.gov.
Real Incidents, Recalls, and Reported Damage
Consumer reports and product safety databases show occasional cases of frozen soda cans rupturing in freezers, cars, or shipping containers. The U.S. Consumer Product Safety Commission tracks incidents involving pressurized containers, and beverage companies such as Coca-Cola and PepsiCo issue storage guidelines to minimize risk. In warehouse and retail settings, cold exposure during transport can lead to seam failures, which are sometimes classified as product defects if packaging instructions were not followed. For more on product safety reporting, visit CPSC.gov.
Major beverage firms use quality testing that includes freeze simulations to set safe storage temperature ranges. Industry data indicates that most modern aluminum cans pass burst tests well above typical freezer temperatures, but older or damaged cans are more vulnerable. Retailers and distributors follow cold-chain protocols to reduce the chance of frozen inventory reaching shelves. Detailed testing methods are outlined in packaging standards referenced by SAIC.
Safety Tips and Best Practices to Prevent Ruptures
To reduce the risk of a frozen soda can rupturing, store cans above 30°F and avoid leaving them in unheated cars or freezers for long periods. If a can has been frozen, let it thaw slowly while still sealed, then open it carefully over a sink to control foaming. Inspect cans for dents, rust, or seam damage before use, since these flaws lower the pressure threshold. Beverage companies publish storage guidance on their official sites, such as Coca-Cola Company.
For businesses handling large volumes of canned beverages, monitoring warehouse and transport temperatures is critical. Automated alerts and insulated storage can prevent cold-related failures that lead to waste, cleanup costs, or safety incidents. Insurance and risk management teams often reference packaging test data when setting storage policies. Regulatory frameworks for hazardous material handling, including pressurized containers, are maintained by agencies such as OSHA.gov.