noun
inner lid
Refers to a lid placed inside a container, often beneath an outer lid (外蓋). Common in contexts like traditional Japanese containers, bento boxes, or tea ceremony utensils.
See also: 外蓋
この茶入れには内蓋がついている。
This tea caddy has an inner lid.
弁当箱の内蓋を外して、電子レンジで温めてください。
Remove the inner lid of the lunch box and heat it in the microwave.
外蓋 is the outer lid, while 内蓋 is the inner lid placed inside.
Compound of 内 (uchi, 'inside') and 蓋 (futa, 'lid'). The reading うちぶた is a straightforward combination.