The story
From bento + box. Bento is borrowed from Japanese 弁(べん)当(とう) (bentō, “food to be eaten on the go; takeaway lunch served in a box”).
Etymology from Wiktionary, CC BY-SA 4.0.
bento box
ben·to boxToday it means: A partitioned, traditionally lacquered, lunchbox in which a bento (“Japanese takeaway lunch”) is served. Full definition →