Silicone gasket for the lid of the mini square school lunch can .
When re-installing the removed silicone gasket, make sure the lower part of the silicone gasket is on the outside and the higher part is on the inside, as described in the instruction manual.

How to remove and install silicone gaskets (video)
※Yu-Packet compatible product
*Up to 4 items can be sent via Yu-Packet (360 yen)
*If purchased together with a product eligible for home delivery, home delivery charges will apply.
■Material
Silicone Rubber Packing / Silicone resin (heat resistant temperature -20 to 220 degrees)