How to choose a good lunch box (bento box)

Nowadays，bento boxes are very important for white-collar workers, bodybuilders and students. So how to choose a high-quality bento box? Let's analyze the advantages and disadvantages of several different materials and styles of Bento boxes.
1. Glass lunch box

Advantages: High safety. The heat-resistant glass material can withstand about  400 ℃. It can be used in microwave oven, oven, and easy to clean. You just need to us a little of detegrent for cleaning  ather use .
Disadvantages: Easy to break, It is easy to cause bursting when  use in wrong way. Glass tableware is clean and sanitary, and it  does not contain toxic substances, but sometimes glass tableware will be  "moldy". Because the glass is eroded by water for a long time, the sodium silicate in the glass reacts with the carbon dioxide in the air to form white carbonate crystal, which is harmful to human health, so it can be removed with alkaline detergent before  use. Also,the glass is heavy and inconvenient to carry out.
2.Stainless steel lunch box

Advantages:Good metal performance.The 304 stainless steel is more corrosion-resistant than other metal products, high temperature resistant and it can be directly heated on open fire, easy to clean, not easy to damage, and stainless steel  utensils are beautiful and durable, so more and more  are used to make kitchen supplies
Disadvantages: it can not be used in microwave oven, and can not hold salt, soy sauce and vinegar for a long time, or it will release trace elements, which will accumulate in human body, and will harm human health when reaching a certain limit.
3.Plastic lunch box

Advantages: Food-grade plastic lunch boxes are safe for the human body. Plastic is a common lunch box material, because it can achieve the advantages of other materials in one, it is handiness microwaveable,  sealed, and a variety of styles. The material is environmentally friendly, good sealing, with air valve, large capacity, easy to carry, good looking, single layer and double layer, microwave oven and dishwasher are not a problem.
Disadvantages: can not be insulated, not suitable for long time heating, after multiple heating, the loss of the lunch box is relatively large
In general, each style of lunch box has its own advantages and disadvantages, depending on everyone's needs. If you need to heat food for a long time, and the food taken out is not very frequent,Then you can choose a glass lunch box. If you don't need microwave to heat food and the food does not have too much sauce, then you can choose a stainless steel lunch box. If you need to heat food for a short time and need to go out to carry,Then a handiness and large capacity plastic lunch box will be your best choice.
Tips：1. The best choice for stainless steel lunch box is 304 stainless steel or above, 201 stainless steel is easy to corrode
2. Plastic lunch boxes need to be made of food grade materials, common ones are "PP materials", and the bottom mark is“ cycle 5”
3. For the glass lunch box,it is better to choose teh high borosilicate heat-resistant glass material