OXO Good Grips POP Accessories is a brand-new line of tools designed to help you make the most of POP. 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. To use: soak the Saver for 15 minutes, pat dry and then secure to the underside of the POP Container lid. Re-soak as necessary to keep things fresh. Do not wash with soap. 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.