I just purchased a 6 cup electric rice cooker from Rival. The cooker did not have the rice cup in it and I called Rival to get one. They are out of it and won’t have one for 6 weeks. I know that the plastic cup is not a full cup and when I called them to asked what the exact measurement was for the cup know one really knew. What a joke. Can someone tell me what the exact amount of rice does a rice cup hold. I think that they should all be the same.