A cheese butyrometer with a weighing cup and two rubber stoppers is a tool used to measure the butterfat content in milk and dairy products. The butyrometer is a graduated glass cylinder with a scale that measures the specific gravity of a liquid, which is directly proportional to its butterfat content.

The weighing cup is used to hold a sample of the dairy product to be tested, and the rubber stoppers are used to seal the cup and the butyrometer during the testing process. This type of butyrometer is designed to measure butterfat content in the range of 0-40%, making it suitable for testing a wide variety of dairy products.

The combination of the butyrometer, weighing cup, and rubber stoppers are commonly used in the dairy industry for quality control and production purposes.