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.
Pay attention to the manufacturing materials when buying plastic boxes. Because the heat resistance of polypropylene (PP) is higher than that of polyethylene (PE) and polystyrene (PS), it is suggested that families who have meals at work choose PP products. ..
2, stainless steel material
Some people like to bring homemade fruit salad. Cold dishes with only fruits and salads do not need high temperature heating, and stainless steel lunch boxes are more suitable.
3. Heat-resistant glass materials
Foods with high oil content and sugar content are recommended to be packed in glass lunch boxes or heated in microwave ovens, which will not decompose harmful substances and are relatively heavy and need to be carried in professional lunch bags.
4. Preventive measures
Plastic lunch boxes also have a shelf life. After expiration, the plastic will age, change color and become brittle. If it is found that the used plastic box is yellow or no longer transparent, it should be replaced as soon as possible.
5. How to choose a box lunch with rice?
First: choose a fresh-keeping box.
1, pay attention to the plastic box material.
Pay attention to the manufacturing 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 families who have meals at work choose PP products ... But many microwave oven food plastic boxes are made of PP, but the covers are made of PE or PS, so take off the covers when heating food.
2. Replace the plastic crisper regularly.
Experts pointed out that if plastic boxes are often heated and exposed to the sun, it is easy to destroy plastic molecules and become fragile and aging. Therefore, if the plastic box is found to be hard, transparent, atomized, deformed or scratched, it should be replaced. If you put it in the microwave oven again, it will release more harmful substances.
3, thoroughly clean before use.
Before using it for the first time, wash it thoroughly with detergent. However, people who bring food to work should pay attention to avoid using abrasive scouring pad to avoid scratching the plastic box.
Step 4 switch to glassware
In fact, the best way to bring food to work is to switch to glassware. Especially when heating foods with high oil content or high sugar content, it is very easy to destroy rubber molecules. It is best to use glass or ceramic utensils suitable for microwave ovens.
5. Don't microwave plastic boxes casually.
Sometimes hotels will provide customers with boxes to pack. If the box is not marked or the manufacturer's instructions indicate that the product can be used in the microwave oven, the food should be transferred to a suitable container for heating.