Do not wash with soap. The OXO POP Brown Sugar Saver is a reusable terracotta disk that brings an end to rock-hard brown sugar by keeping it soft and fresh. This ingenious gadget works with the OXO Pop containers to keep your brown sugar soft-or soften brown sugar that has already hardened The OXO POP Brown Sugar Saver is a food-safe terracotta disk that keeps brown sugar soft and fresh The Brown Sugar Saver can be reused as needed, simply soak disk again when brown sugar begins to harden, do not wash with soap Only attaches to POP lids with circular holders on the underside Canisters Sets For The Kitchen Oxo Good Grips Pop Container Brown S... Fake Review Flour Container Recommended for use with the 1.1 Qt / 1.0 L POP Container, sized for 1 lb of brown sugar, and the 1.7 Qt / 1.6 L POP Container, sized for 2 lbs of brown sugar; also fits POP Containers with lid type: A, B, C, D, E. BPA free. Re-soak as necessary to keep things fresh. OXO Good Grips POP Accessories is a brand-new line of tools designed to help you make the most of POP.