OSK's "Bomb Onigiri" (rice ball) case, designed for making onigiri without needing to shape them by hand. This case allows you to make onigiri that are about twice the size of convenience store onigiri (290ml). It comes with a press mold for firmly shaping the rice! Using plastic wrap, you can make many onigiri without getting your hands dirty. Type: Bento box for adults, Bento box for children, Bento bag/lunch bag Material: Plastic