Material: Polypropylene Consists of 8 different sizes of 11 containers. HPL818/1.9L/20.5 x 13.4 x 11.8cm HPL822D/1.2L/15.5 x 15.5 x 8.7cm HPL850/420ml/12.1 x 12.1 x 6cm HPL815M*3/850ml/18.1 x 12.8 x 6.8cm HPL814*2/460ml/15.1 x 10.8 x 5.8cm HPL933A/750ml/Ø14.2 x 8.3cm HPL932/300ml/Ø11.4 x 5.5cm HLE8224S2/970ml/16 x 14.5 x 8.6cm. Classic Container (HPL): Airtight and liquid tight. Container lock tightly to keep refrigerator odor out and keep food fresh. Good for storing various leftovers, fruits, and vegetables. E.ZLock container (HLE): Not airtight and liquid tight. Features metric measurements. Groove design improves heat transfer in microwave. Classic and E.ZLock Containers: Refrigerator, freezer and microwave safe. BPA free. As fatty foods (curry, stew, porridge, etc) can cause overheating, please replace it with other container before using microwave.