Carbonated Beverages:

• Carbonated beverages, such as soda or sparkling water, should not be stored in a thermos. The built-up carbonation in these drinks can increase pressure inside the thermos, potentially causing leaks or an explosion when opened.
• • Milk or Dairy Products:
    • Milk and other dairy products are prone to bacterial growth when stored at room temperature for an extended period. Storing dairy in a thermos without proper refrigeration can lead to the growth of harmful bacteria, potentially causing foodborne illnesses.

  It’s important to use thermoses as intended and follow the manufacturer’s guidelines for safe use. Always ensure that the beverages you plan to store in a thermos are appropriate and safe for storage in an insulated container to avoid any health risks or damage to the thermos.