About this item 7, 34, 17, 10, 4.2oz), 8 pack round containers(40.6, 24, 13, 6, 4oz), sizes ranging from large to small, it easily meets most storage needs. High Quality Material: Entire airtight container is made of high quality food grade plastic material, BPA free, odorless, easy to clean and can withstand long time reuse. 100% Leak Proof : Food storage container with lids are protected by a high quality silicone seal and 4 side latches, double protection ensures excellent sealing and leakage prevention. Space Save: Food containers are designed with multiple nesting layers, from large to small meal prep containers can be nested into each other, saving you more valuable space in your pantry and kitchen. Convenient Safe: Food containers with lids can be heated in the microwave, washed in the dishwasher, and stored in the refrigerator & freezer for a long time. (Note: Please do not put the lid on the microwave heating, the high temperature may deform the sealing ring in the lid, resulting in weakened sealing performance)