Which has better thermal insulation effect, the foam box or the insulated bag?

People who often deal with fast food know that fast food needs to be kept warm during transportation. Ice cream also needs to be kept cold during transportation. Commonly used thermal insulation packaging for transportation includes foam boxes and insulated bags. Then, let's take Napulong Foam Factory as an example to discuss which one, the commonly used foam box or the insulated bag, has a better thermal insulation effect. The foam factory in Dongguan can tell you responsibly that the cold insulation effect of the foam box is better than that of the insulated bag. However, the insulated bag is easier to carry compared to the foam box. The reasons are as follows: 1. The foam box has the function of heat insulation. 2. The structure of the foam box is fixed, making it less likely to be directly close to heat sources such as the human body. 3. The thermal insulation time of the insulated bag is about 6 hours, while the foam box can keep the cold for up to one day.