Gather all the hamburgers together in plastic bags, and then tie the plastic bags tightly so as not to leak. It is best to fill it up. You can blow it with your mouth, or you can directly open it and fill it with air, so that it can keep warm and protect the hamburger from being squeezed. Just like buying shrimp strips, packaging is always bulging and full of gas, which can protect the food inside from being crushed.

When the outside wind is strong, the temperature in Hamburg may drop rapidly. Better wrap them in more bags. Better wrap it in clothes. You may not have an incubator with you. Cartons are also good.

The packaging box of each hamburger should be tight and not exposed.