The Pack & Range side dish container has no rubber gasket on the lid, so can I store food with liquid in it?

The silicone or rubber gasket commonly seen on the inner rim of lids cannot be seen on this container. IWAKI's Pack & Range lineup is a product with no separate sealing gasket on the lid^[1][2], and it is not made for the purpose of complete airtightness^[3]. If you store braised dishes or stews with shallow liquid and tilt the container sideways or put it in a bag where it gets shaken, the contents may spill out through the gaps.

Instead, the gasket-free structure makes everyday handling and washing much easier to maintain. There is less concern about red seasoning staining or mold forming in rubber crevices, and there is no need to detach, wash, and dry the gasket every time you do the dishes. hmmm, its original purpose comes to life fully when used as a table storage bowl that you take out of the refrigerator and heat up directly, rather than as a lunch box carried in a bag.