It is super convenient to prepare meals in these durable Food contact materials. The hard plastic structure will ensure that no cracks or fractures occur. The leak proof cover will tightly seal the container to prevent any annoying leaks or spills in your bag or freezer. These containers cannot be placed in the oven. Frozen food must be thawed before reheating. If there is too much oil, fat, sugar, or salt in the food, do not use a bento box. It is also ideal for catering services it is ideal for packaging food in your Delicatessen, kiosk, catering service or restaurant to provide food for accompanying meals..syi