It is a lunch box with a cold insulation effect. A [good] strong cold lunch bag sticks. , Microwave oven is OK with closing the lid, you can use it in the vessel washing dryer! In telescoping become one stage, the lunch box lower you can carry in compact air control valve attaching postprandial packing is a special resin processing the rice is hard to stick to prevent the with suck-lid to prevent juice leakage amount of rice entering the, cold insulation lunch bag with (1 cup = bigtime and as about 200ml) durable, is about 2.6 cups of the bigtime.