From Golden Rabbit, this set of 4 mugs features: This enamelware is made of carbon steel coated with a porcelain enamel and trimmed in stainless steel. There will be variations in the shading of colors and pattern formations which are the results of the hand-dipped process.  Set of 4 mugs Enamel Steel Stainless steel rim Lobster Collection Hand-dipped  Oven & Stovetop Safe Dishwasher Safe Measures approx. 3.5"tall Capacity approx. 24-oz Imported.