A bottle jack is a type of hydraulic jack used to lift heavy loads, such as vehicles or machinery. It consists of a cylindrical body that resembles a bottle, hence the name. When the handle is pumped, hydraulic fluid is forced into a cylinder, raising the lifting arm and the load above it. Bottle jacks are compact and portable, making them ideal for use in tight spaces. These jacks are commonly used in automotive repair and construction. They can lift weights ranging from a few tons to several tons, depending on the model. Safety features, such as overload protection, are often included to prevent accidents during operation.