K's Denki is a popular Japanese electronics store and they collaborated with Hello Kitty to create this cute design. The top white portion holds two onigiri (rice ball) and the red compartment below can be used for holding small bento sides. A designer Hello Kitty elastic strap helps it hold it together securely in transit. It measures approximately 12.5x12x8cm (approx. 5"x4.75"x3.25") The bottom tray has a snap on lid and holds about 230 ml. The rice ball compartment holds 550 ml.