What practical role does the non-airtight glass lid play in actual use?

Kimura Glass Vegikaku is not an airtight container^[1]. Because there is no rubber gasket or locking wings to seal gaps, it is difficult to use it to prevent liquids from leaking or for long-term storage. However, because it comes with a dedicated glass lid, you can directly cover leftover side dishes or prepped ingredients without using disposable plastic wrap when storing them^[2]. You can keep it in the refrigerator and simply take off the lid to place it straight on the dining table at mealtime.

The material is borosilicate glass^[3]. Compared to ordinary soda-lime glass, it has a lower coefficient of thermal expansion, making it a material that withstands temperature changes relatively well. The shape may not be a completely straight rectangle, and some indented spots on the surface may be visible from the process of the glass solidifying^[4]. While it does not fit snugly like machine-stamped airtight containers, it is a dish that reduces the hassle of using plastic wrap in the kitchen and naturally connects cooking with table setting.