OXO Good Grips POP Accessories are a brand-new line of tools designed to help you make the most of POP Containers.* The OXO POP Rice Measuring Cup is perfect for portioning one standard cup of rice (180 mL) for use in pressure slow or rice cookers. Like all POP Accessories it secures neatly to the underside of new POP Container lids. Fits POP Containers with lid type: Big Square and Rectangle. Recommended for use with the OXO POP Container Big Square Medium (4.4 Qt/4.2 L) sized for 5 lbs of rice. Dishwasher safe and BPA free. *Only attaches to POP lids with circular holders on the underside available as of August 2019.