In what unit of measurement must the volume of bottle contents be stated on the label?

The volume of bottle contents must be stated on the label using the metric system, which is the standard for labeling in many countries around the world. Specifically, this entails expressing the volume in liters or milliliters. The metric system is favored because it provides a universal standard that is easily understood and used globally, which helps facilitate international trade and consumer understanding.

In the context of spirits, clear and consistent measurement helps ensure compliance with labeling regulations and provides consumers with accurate information about the quantity they are purchasing. While other measurement systems like imperial or customary units may be commonly used in certain regions, they do not provide the level of uniformity and global applicability that metric measurements do. Therefore, the requirement to use metric units helps maintain clarity and standardization in labeling across different markets and consumers.