noun
chopstick case
A container for carrying or storing chopsticks, often used in lunch boxes or for personal chopsticks.
お弁当に箸箱を忘れないでね。
Don't forget your chopstick case for your lunch box.
Compound of 箸 (hashi, 'chopsticks') and 箱 (hako, 'box'), with rendaku voicing of 箱 to ばこ.