Joseph Joseph Nest Lock Containers are perfect for fridge & freezer storage, batch cooking or family lunch boxes. The container bases nest neatly inside each other for efficient, space-saving storage.Keep food fresh in Joseph Joseph’s ingeniously designed snap-lock containers.Get organised with the help of these leakproof, multi-sized storage container sets. Space-saving, nesting design. Easy-find, snap-together lids and color-coded bases. Airtight, leakproof and stackable lids. Freezer, microwave and dishwasher safe (top rack only), BPA free. Materials: Polypropylene/silicone Dimensions of Rectangle 3-piece nested set: 7.5 x 9.25 x 5.5 inches Dimensions of Rectangle 4-piece nested set:H6.9 x W9.5 x D7.7 inches Dimensions of Round 4-piece nested set: H7.7 x W7.7 x D7.7 inches Care & Use: Freezer, microwave, and dishwasher safe (top-rack only). Before using in a microwave, remove lid and place loosely on top of container – do not close lid. Use caution when removing container from microwave as it may become hot during heating. To prevent stains, pitting or other problems associated with high temperatures, avoid overheating foods high in oil, fat, sugar or strong colorants, such as tomato. Not suitable for use in ovens or under grills.