Captive-Top Pocket Flask, available in 2-1/2 ounce or 6 ounce sizes. Stainless steel. 2-1/2 ounce flask is 3-1/4" tall, 2-3/4" wide, 3/4" deep. 6 ounce flask is 4-1/2" tall, 3-7/8" wide, 3/4" deep.