This is a traditional bento lunch box from Japan, microwavable without lids. The Bento lunch box has three tiers. The bottom tier holds 250 ml (about 1.2 bowls of rice), the second tier holds 330 ml and the top tier is for chopsticks, or a fork. The Bento lunch box is microwave safe with the lids off. The bento box is 6.29 inches long, 3.5 inches high and 3 inches wide. This is a 5 piece Bento Lunch Box, blue color. Bento Lunch Box Material - Main Bento container = Polypropylene - Outer Lid = Styrol - Inner Lid = Polystyrene