This particular bento case was a collaboration with a Japanese Life Insurance company (Sumitomo) so it is quite rare. It is a double compartment plastic container with both inner and outer lid that holds the included white chopsticks. The bottom container holds 380 ml while the top container holds 250 ml. The unit is new in pristine condition and measures about 17 x 8 x 6 cm (approx. 6.5"x 3.5" x 2.5") What a nice bento box to take to work, school, or a picnic.