In 2-quart saucepan, heat 1 1/4 cups water and the rice to boiling. Reduce heat to low; cover and simmer 10 to 15 minutes or until tender. Transfer to large bowl, tossing rice with chopsticks or 2 forks to cool slightly. Gradually add 1/4 cup vinegar to rice, tossing constantly. Cover bowl with damp towel; cool rice to room temperature.