Eating immediately after opening the bag means that it is recommended to eat as soon as possible after opening the package. This kind of food is generally not easy to preserve. If exposed to the air, it is easy to breed bacteria, so eat it as soon as possible. Take out the unfinished food, tighten the belt mouth clockwise by hand, then take out the toothpick, put it across the mouth of the policeman's bag, press it with your thumb, and then wrap the belt mouth clockwise with a rubber band for a few times, so that it can be preserved for about one day.

The food that can't be eaten can be sealed again with the waste heat of the gas stove. Turn off the gas stove every time after cooking, and the temperature on the stove is still very hot. When we turn off the stove again, we only need to hold two food bags by hand, close to the burning part of the stove, stick the adhesive part of the food bag tightly to the iron position of the stove, and rub it back and forth a few times to make the deformed food bag more firm.

It is dangerous to seal food with a gas stove, and sometimes it will burn your hands, so you must be careful in this way.