A bottle jack is a type of hydraulic jack that is used to lift heavy objects, such as cars or trucks. Its design resembles a bottle, which is where it gets its name. Bottle jacks are compact and portable, making them ideal for use in garages or on the road. They work by using hydraulic fluid to create pressure, allowing the jack to lift heavy loads with minimal effort. These jacks are often used in conjunction with other tools, like a jack stand, to ensure safety while working on vehicles. When using a bottle jack, it's important to follow safety guidelines to prevent accidents. Always make sure the jack is on a stable surface and never exceed its weight limit.