1, the glass lunch box with hot meals, with the lid will be sealed and placed for a period of time after the meal inside the lunch box cooled down, inside the air pressure will be lower than the outside, resulting in we can not open the lid of the lunch box. If the lid of the glass lunch box can not be opened, we can use a knife, keys and other metal sheet, in the gap between the lid and the mouth of the cup gently pry upward, the air into the lunch box, we will be very easy to open the lunch box.
2, or we can put the lunch box into a large plastic box with boiling water, soak for about 5 minutes and then remove it, and then cloth wrapped lunch box lid, unscrew it. If there is a microwave oven, we can put the lunch box into the microwave oven to heat up, and then open the lid of the lunch box while it is still hot.
3, we can also leave the lunch box for a period of time, because the lunch box is not 100% sealed, the air will gradually enter the lunch box, until the lunch box inside and outside the pressure of the same time, we can open the lid. If it still doesn't work, we can use a syringe needle to poke the lid and let the air into the lunchbox.
4, if the empty lunch box can not be opened, then it may be because we will cover the lid too tight, we can use detergent for lubrication, so you can easily open the lid. Many office workers will put the glass lunch box into the microwave oven to heat, in the heating of the glass lunch box, we do not fasten the lid of the glass lunch box.
Summary: on the glass lunch box lid is sucked how to do, I will briefly introduce to you here. I hope that after reading this article, you can understand all of this. When we heat the glass lunch box, be sure not to use the lid to seal it well.