Espresso demitasse cups hold 3 to 4 ounces, but they are traditionally filled only to about 1.5 ounces. Painted and decal decorations are under the glaze; the only difference is looks.
Cappuccino cups hold about 6 oz. The traditional cappuccino contains 1/3 espresso, 1/3 hot milk, and 1/3 froth. The thicker the cup, the hotter the coffee will remain. Painted and decal decorations are under the glaze; the only difference is looks.