Cases, often referred to as containers, are structures used to hold, protect, and organize items. They come in various shapes and sizes, designed for different purposes, such as storing tools, electronics, or personal belongings. Common materials for cases include plastic, metal, and fabric, each offering varying levels of durability and protection. In technology, cases are essential for safeguarding devices like smartphones and laptops from damage. They can also enhance portability, making it easier to transport items safely. Additionally, cases can be customized for aesthetic appeal, allowing users to express their personal style while ensuring their belongings remain secure.