This emoji shows a bento, actually a lunch box, and is divided into many different parts filled with vegetables, seafood like sushi, and portions of food. The box is most commonly used in Japanese culture.
Note: Bento Box was approved for Unicode 6.0 in 2010 and included in Emoji 1.0 in 2015.
🍱 Lunch Box
:bento: (Github, Slack)bento box emojiemojiemoji copy and pastelunch box