@windaelectronics: These are stainless steel mixing bowls. Material: Made from durable, food-grade 304 stainless steel. Features: Includes internal measurements/scale markings for precise ingredient preparation. Design: Stackable, space-saving design ideal for mixing, salad serving, and storage. Sizes: Commonly sold in sets with varied measurements of 1200ms ls, 1800mls and 2500mls.