The Specific Gravity Bottle for Physics Lab is a laboratory instrument used to determine the specific gravity (relative density) of liquids by comparing their density with the density of water at a specified temperature. It is designed for accurate measurement of liquid volumes and is commonly used in physics, chemistry, and educational laboratories. Its compact design and easy handling make it suitable for practical experiments, laboratory demonstrations, and student training. This apparatus helps students understand the concept of density and specific gravity through practical observation and measurement.