Cylindrical containers are three-dimensional shapes with two parallel circular bases connected by a curved surface. They are commonly used for storing liquids, such as in bottles, cans, and tanks. The volume of a cylindrical container can be calculated using the formula V = \pi r^2 h , where r is the radius of the base and h is the height. These containers come in various sizes and materials, including plastic, metal, and glass. Their design allows for efficient stacking and storage, making them practical for both industrial and household use. Examples include drums for shipping and jars for food preservation.