Cylindrical objects are three-dimensional shapes characterized by two parallel circular bases connected by a curved surface. Common examples include cans, pipes, and tubes. The height of a cylinder is the distance between its bases, while the radius is the distance from the center of the base to its edge. Cylinders can be found in various applications, from everyday items like water bottles to industrial components like conveyor rollers. They are often used in engineering and manufacturing due to their strength and ability to efficiently hold or transport materials.