Keyword Analysis & Research: why is it called a bento box

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
why is it called a bento box	1.13	0.1	7014	49	28
why	1.76	0.9	23	51	3
is	1.04	0.6	2182	62	2
it	0.58	0.2	3878	82	2
called	1.65	0.4	7882	80	6
a	1.12	0.2	3025	91	1
bento	0.07	1	4201	28	5
box	1.73	0.9	2718	78	3

Keyword	CPC	PCC	Volume	Score
why is it called a bento box	0.48	0.4	4586	42