Advantages and disadvantages of glass insulated lunch box

The glass insulated lunch box depends on the insulation method. Generally, the insulation effect of interlayer is not very good, that is, a layer of foam is added to the glass liner, but the price is cheap. If it is vacuum insulation, it is as hollow as a thermos bottle, and the insulation effect is very good, which is better than other metal insulation containers. However, because the hollow glass container can't be molded at one time, the sealing of the mouth can't be done well unless it is very high-grade. Another advantage of glass heat preservation container is that it is not corroded by acid and alkaline food, so it can be used safely. It is best to buy toughened products for glass insulation containers to avoid cracking due to grade heat. Fragility is the common property of glass, and tempering is better.