This hydraulic vacuum oil bottle stopper is designed to make family oil use healthier. After the stopper has been tightly inserted into an oil bottle, when water is injected into the water aspirator, the hydraulic pressure will create a vacuum in the bottle, ensuring that the oil remains fresh and free from oxidation. This hydraulic vacuum system can save time and effort, while achieving an excellent vacuum. When pouring oil, just remove the stopper to release the pressure, and pour through the flow control valve. The stopper has a sleek, attractive design, and is easy to clean. Placed in the kitchen or on the dinner table, it adds a touch of taste and zest.