Yes, you can put a frozen water bottle in a fridge to cool it down further. This is a common and effective method to rapidly cool beverages or other items in the refrigerator.
When you place a frozen water bottle in the fridge, it acts as a cold source, transferring its low temperature to the surrounding air and items in the refrigerator compartment. This process helps lower the overall temperature inside the fridge and can quickly cool down the other items present.
Using a frozen water bottle is particularly useful when you want to chill a beverage or food item faster than the refrigerator alone would accomplish. It can be handy for situations where you need a cold drink or perishable item at a lower temperature promptly.
Just remember to use a container or bottle that is suitable for freezing, as liquids expand when they freeze and may cause containers that are not designed for freezing to crack or break. Also, ensure that the frozen water bottle is clean and securely closed before placing it in the fridge to avoid any potential contamination.