also: べんとうつつみ
noun
wrapped lunch; lunch package
A lunch box or meal wrapped in a cloth or packaging, typically for carrying. The term emphasizes the wrapping rather than the container itself.
母は毎朝、弁当包みを手渡してくれた。
My mother handed me a wrapped lunch every morning.
遠足には大きな弁当包みを持っていった。
I brought a big lunch package on the school trip.
Compound of 弁当 (bentō, 'lunch box') and 包み (tsutsumi, 'wrapping, package'). The reading べんとうづつみ shows rendaku voicing of the second element.