Putting sodas in the freezer after opening can help maintain their fizziness for a short period, but it's not a long-term solution, and it's not as effective as keeping them properly sealed in the fridge. The idea behind putting a carbonated beverage in the freezer is that colder temperatures can help slow down the escape of carbon dioxide (CO2), which is responsible for the fizziness. When a soda is opened and exposed to air, the CO2 begins to escape, leading to the loss of carbonation over time.
By placing the open soda in the freezer, the colder temperature can temporarily slow down the CO2 release, and it may retain its fizziness for a little while longer than if it were left at room temperature. However, this is not a recommended practice for several reasons:
Freezing risk: Sodas contain water, and when water freezes, it expands. This expansion can cause the soda can or bottle to burst, creating a messy and potentially dangerous situation in your freezer.
Uneven cooling: Freezing a carbonated beverage can cause the liquid to freeze unevenly, leading to ice crystals forming throughout the drink. When the soda thaws, it can result in an altered taste and texture, affecting the overall quality of the beverage.
Container damage: The pressure from the freezing soda can deform the container, especially if it's a plastic bottle, causing it to leak or spill when opened.
The best way to keep sodas fizzy and fresh is to keep them properly sealed and stored in the refrigerator. The cold temperature of the fridge will slow down the release of CO2 and help maintain the carbonation for a longer period. Additionally, if you want to extend the soda's fizziness, consider using a bottle cap or airtight seal to reseal the opened container as tightly as possible to prevent unnecessary CO2 loss.
Remember, carbonated beverages will eventually lose their fizziness over time, even in the fridge, due to the gradual release of CO2. So, it's best to consume them within a few days of opening for the best taste and carbonation experience.