Oval food storage containers with vegetable illustrations. - Brand: YUKIKO HANAi - Design: Vegetable illustrations - Steam vent: Yes Polypropylene Heat resistance: 140°C Cold resistance: -30°C Thank you for viewing. You can align the markings from 1 to 31 to indicate the storage date. When using in the microwave, align with the steam vent. The rounded corners make it easy to wash. Approximate sizes: - Oval (inner diameter) 14.7 x 10.3 x height 5.5 cm Capacity: 600ml - Square 11.3 x 8.3 x height 5.5 cm Capacity: 440ml Convenient sizes. Unlike regular tupperware, the lid is not soft, so it seems like it will last a long time. There are no grooves on the lid, so it's hygienic. It was stored at my parents' house. It's new and unused, but without a box. Thank you.