1. Hard plastic material
This kind of lunch box has good high temperature resistance, light weight, convenient carrying, and the material is not easy to decompose at high temperature, so it belongs to a relatively healthy lunch box.
when buying plastic boxes, you should pay attention to the materials. Because the heat resistance of polypropylene (PP) is higher than that of polyethylene (PE) and polystyrene (PS), it is recommended that the families who bring meals to work choose products made of PP..
2. Stainless steel
Some people like to bring homemade fruit salad. Only the cold dishes of fruit and salad do not need high temperature heating, so stainless steel lunch boxes are very suitable.
3. Heat-resistant glass
Foods with high oil and sugar content are recommended to be packed in a glass lunch box, which can also be heated in a microwave oven, and it will not decompose harmful substances, which is relatively heavy, so it needs to be carried in a professional lunch bag.
4. Precautions
Plastic lunch boxes also have a shelf life. After expiration, the plastic will age, change color and become brittle. If the used plastic boxes turn yellow or are no longer transparent, they should be replaced as soon as possible.
5. How to choose a lunch box with rice
First, choose a fresh-keeping box
1. Pay attention to the materials for plastic boxes
Pay attention to the materials when buying plastic boxes. Because the heat resistance of polypropylene (PP) is higher than that of polyethylene (PE) and polystyrene (PS), it is recommended that the family with rice at work choose products made of PP. However, many microwave oven food plastic boxes are made of PP, but the lid is made of PE or PS, so the lid should be removed when heating food.
2. Change the plastic of fresh-keeping box regularly
Experts point out that plastic boxes will easily destroy plastic molecules and become fragile and aging if they are often heated and exposed to sunlight, so they should be replaced if they become hard, transparent, atomized, deformed or scratched. If it is put into the microwave oven again, it will release more harmful substances.
3. Clean thoroughly before use
Clean thoroughly with detergent before first use. However, people who bring meals to work should pay attention to avoid using abrasive scouring pads to avoid scratching plastic boxes.
4. Switch to glassware
In fact, the best way to bring rice to work is to switch to glassware. Especially when heating foods with high oil content or high sugar content, which are very easy to destroy rubber molecules, it is best to use glass or ceramic utensils suitable for microwave ovens.
5. Don't take plastic boxes out by microwave
Sometimes restaurants will provide packing boxes for customers. If the box body is not marked or the manufacturer's instructions indicate that the product can be used in a microwave oven, the food should be transferred to a suitable vessel for heating.