- Brand: OLD MOUNTAIN - Model Name: Rice Cooker Thank you for viewing. This is a Sierra cup from Old Mountain. It is a rare misprint item where "stainless" was engraved instead of "copper" during the initial lot. Thank you. RICECOOKER 480 Deep Type COPPER OLD MOUNTAIN original memory RICECOOKER In addition to the conventional measuring cup function, it eliminates the need to measure rice and water. Simply fill the rice and water to the lines marked RICE and WATER for perfectly cooked rice. With the COPPER material, the heat conductivity is good, so the rice is less likely to burn during cooking. The inside is nickel-plated, making it more resistant to corrosion than the copper itself and also superior in heat resistance.