A cello case is a protective container designed specifically for storing and transporting a cello, a string instrument. Made from materials like fiberglass, wood, or carbon fiber, these cases provide durability and insulation against temperature and humidity changes, which can affect the instrument's sound quality. Cello cases typically feature padded interiors to safeguard the instrument from bumps and scratches. They often come with handles, shoulder straps, and wheels for easy transport. Some cases also include compartments for storing accessories like bows, rosin, and sheet music, making them practical for musicians on the go.