This durable cube case is made from food-grade polypropylene plastic, and it can hold cubes up to 64mm in size (typical 4x4s and 5x5s). It will help keep your cube clean and free from dust and dirt while carrying it around.
This cube case is made by YuXin, and it is the same case that comes with various YuXin cubes, including the YuXin Blue 4×4 and the YuXin 5×5.