Spice holders, also known as spice racks, are containers used to store and organize spices. They come in a variety of shapes and sizes, and can be made from materials such as wood, metal, or plastic. Spice racks are often wall-mounted, allowing for easy access to the spices. They can also be placed on countertops or inside cabinets. Spice holders are an essential kitchen tool for any home cook, providing an organized way to store and access spices.