The bowls are stainless steel, and the hot sandwich maker is made of aluminum die-cast, etc. Please refer to the instruction manual. Bowl heights: Large...approx. 8.5cm, Medium...approx. 7.8cm, Small...approx. 7.2cm. Due to long-term home storage, there are scratches and minor imperfections on the bottom of the bowls. Please check photos 16, 17, and 18. There is no problem with use. Would this be suitable for someone who doesn't mind minor details? The bowl's outer box has dirt, stains, and scratches. The hot sandwich maker does not have a box. Please understand that this is a personal inspection, home storage, and packaging with recycled materials.