18 ounce stainless steel rimmed cup in blue graniteware from GSI Outdoors. Perfect for the campsite, picnics, home, or RV! Cup has a 3.75" diameter and stands 3.75" high. Inspired by traditional graniteware, GSI Outdoors enamelware blends old fashioned charm and functionality into one sturdy package. Made from heavy gauge steel with the classic speckled finish, every piece is kiln fired twice at 1400 degrees to stand up to scratches and chipping. Enamelware is not intended for microwave use.