A bento: a packed Japanese boxed lunch, usually a single-portion meal in a container.
毎朝、母が私の弁当を作ってくれる。
Every morning my mother makes my bento for me.
今日は忙しいからコンビニで弁当を買って食べるつもりだ。
I'm busy today so I plan to buy a bento at the convenience store to eat.
遠足にはサンドイッチと果物を入れた弁当を持って行った。
I took a bento with sandwiches and fruit for the excursion.