Pour a small amount of hot water into a plastic bottle, shake it, pour out the hot water, and immediately tighten the bottle cap. What did you see after a while?

You should do this experiment in the same way. Find a smaller glass bottle in autumn and fill it with one third of hot water, preferably above 80℃. "Don't drop boiling water into the cold gadgets taken out of the refrigerator, but when the ice cubes are put on the spoon and moved to the glass bottle mouth, they will be surrounded by white fog. You can cut out a spiral piece of paper and throw it on a rope. You can observe the paper spinning, then put a balloon on the bottle and reinforce the connection with a rubber band. It will stand still for 2 hours. When you put it in the refrigerator, the balloon will become smaller and there will be a little condensed water.