Convenient square shape that can be used for cakes, bread, and even for cooking. This product is made of steel with silicone resin for excellent heat conduction, and the shape is good. Please note that it may rust if left in water for a long time. When using for the first time, please wash with a sponge with dish detergent. Avoid open firing or open flames, and use in the oven. (Not microwave safe). Use a sheet or apply an oil such as butter on the inside to make it easy to remove from the mold. If you contain tannins such as coffee or tea, the iron ions and tannins may react with black spots on the fabric. Please use a matting paper.