This is a "GLASS CONTAINER Heat-Resistant Glass Food Storage Container" from 3COINS. It can be used in the oven and microwave, and can also be frozen. This is a set of 2 S-size containers. Size: Approximately 10.5cm (length) x 15cm (width) x 5cm (depth) Capacity: 370ml The lid has a rubber gasket and an air valve (indicated by the red arrow in the lower right image) and features a 4-point locking system. I used these for about a year, but have been storing them since then, and they are in good condition. The lids are included, but they are made of plastic, so they may show some signs of use. The gaskets can be removed and washed for hygiene. Glass food storage container Lid features: Airtight 　　　　　Oven/Microwave: Yes 　　　　　Freezer: Yes