Is it good to eat cooked beef and braised beef in a box lunch at one time?

If the disposable lunch box meets the national safety standards, it is no problem to pack braised beef cooked food. Disposable lunch boxes are plastic products. At present, the quality of disposable lunch boxes on the market is uneven Some plastics fail to meet the national standards, and some harmful substances are added. This disposable lunch box can't be used Food-grade plastic products can hold food, but we can't tell whether there are harmful substances, so Kazakhstan should try to use disposable boxed braised beef cooked food as little as possible, and can bring its own things to hold it.