A new portable measuring cup for voided volume.

When recording daily urine volumes for the frequency-volume chart, a patient must measure voided urine volume throughout the whole day. Unless the patient stays at home, the conventional 500-mL paper or plastic cup must be carried with at all times, which can be very embarrassing and troublesome for the patient, so a collapsible, portable measuring cup has been developed. To determine the measuring accuracy of the new cup, the visual estimate was compared with the actual volume. The cup was found to be a highly accurate and useful container for measuring voided urine volume.